Lauren ("LC") moves from Laguna Beach to Los Angeles where she plans to apply for an internship at Teen Vogue and attend fashion school. Alongside her is best friend Heidi who is pretty much just into the party scene. The real test of Lauren's new life is if she can juggle work, school, and partying. However, no matter where she goes, drama always seems to follow.

Lauren has to face her boss after the party. Meanwhile, Heidi doesn't take school seriously and makes different plans for her future.

Lauren gets an assignment to fly to New York and deliver a dress for a fashion show. Heidi is faced with the reality of her "dream job" because she is expected to do work.

Lauren receives flowers and another phone call from Jason. Heidi almost calls it quits from her job at Bolthouse Productions after being told that she cannot travel to Las Vegas with her co-workers as she is not yet 21.

After a Teen Vogue event, Lauren hurries home as it's Jason's birthday. However, things don't go well as Jason only wants to hang out with his friends.

Heidi gets her big chance to work in the nightclub scene, but it happens to fall on her anniversary. While at a Teen Vogue fashion show, Whitney is asked to walk the runway since a model is a no show. Meanwhile, Jason does his best to get Lauren to pay more attention to him, and less to work and school.

As the holiday season comes around, Lauren, Heidi, Jason and Jordan are ready to celebrate. However, things don't go so well. While at a New Year's Eve party Lauren and Jason have a big fight, causing Lauren to storm off with Heidi.

Whitney and Lauren are given the task of photographing male models for Teen Vogue, causing Jason to feel jealous. Meanwhile, Heidi and Jordan get into yet another argument.

Heidi and Jordan's relationship starts to go downhill as Heidi starts to realize that she may not feel true love for Jordan.

Lauren and Jason make plans to spend the summer together, but their plans take a turn when Lauren is offered a summer job in Paris, France.

Lauren faces the aftermath of her decision to opt out of her summer internship, Whitney returns from her internship, and Audrina and Heidi find themselves in a major feud over a new guy.

Heidi finds out the results of her pregnancy test while Lauren and Whitney are asked to cover a major fashion show. Meanwhile, Audrina turns Spencer down when he asks her out on a date.

Heidi throws a party for her birthday where Audrina shows up to try and make amends. However, Heidi refuses to listen.

Heidi and Audrina go out to have dinner and they finally talk about their issues and Spencer.

Spencer refuses to let go of Heidi. Meanwhile Lauren and Whitney are on the spot, because "super-intern" arrives at Teen Vogue.

Lauren is not at all thrilled in Heidi's decision to get back together with Spencer. The situation between best friends becomes even more heated and leaves their relationship hanging.

As if Lauren's falling off with Heidi wasn't enough, another one of her eldest friends, Jen, has eyes for Brody. Jen feels guilty for hooking up with Brody but Heidi encourages her to go for what she wants. Clearly, there is a lot more to mend in their relationships and Lauren assures Heidi that they'll never be the same as long as Spencer's still in her life.

Lauren tries to make peace with Heidi, but is instead stood up when Heidi decides to meet up with Spencer instead. Meanwhile, Whitney finds herself annoyed at the fact that she is not respected as a Teen Vogue intern.

Lauren and Audrina make plans for New Year's Eve with a pizza and champagne pre-party. Spencer asks Heidi to move in with him and Lo moves into L.A.

Heidi decides to throw Lauren a surprise 21st birthday party and tells her about Spencer asking her to move in with him. Jen tries to apologize to Lauren but instead makes excuses, thus, Lauren doesn't accept her apology.

Whitney is getting ready to work with Teen Vogue after graduation, however, she has a lot of competition with other interns. She also gets to model at "Good Morning America." Meanwhile, Spencer still insists that Heidi move in with him.

Whitney flies to New York City to apply for a new job at Teen Vogue. Meanwhile, in Los Angeles, Heidi gets a call from Spencer who has a huge surprise for her.

The third season premieres with Lauren and Heidi still unable to get past their differences and having become mortal enemies. Meanwhile, Whitney has graduated from college and is now juggling a real job and Audrina has become Lauren's new roommate and best friend.

Lauren returns to Laguna Beach for some advice. Meanwhile, Audrina and her new beau get serious with their relationship and Spencer proposes to Heidi.

Audrina invites Lauren out to dinner to get to know Justin better. Lauren is not impressed by him. Audrina talks to Justin and decides to give their relationship time. Spencer suprises Heidi by buying two arcade games for the apartment. Later, she suprises him by painting over the mural in the living room.

Spencer and Heidi go away for the weekend to meet Heidi's parents, causing Spencer to flake on his and Brody's barbeque. Lauren, Audrina, Lo, and Justin Bobby attend. Justin Bobby flirts with other girls and leaves Audrina at the party, and Lauren finally realizes that she and Heidi will never be friends again.

Just when everyone believes that Justin Bobby is finally history, Audrina decides to rekindle the relationship, much to Lauren and Lo's surprise.

Lauren is still wondering who could be the guy for her when suddenly Jason gives her a call and wants to catch up.

Heidi tries to fit into her new job. Meanwhile Lauren has to decide if she will give Jason another chance.

Spencer and Heidi's wedding date gets closer, but will he tell his family before he steps into church? The Teen Vogue event gives Whitney and Lauren a lot of work, while Jason tires to start over with a new girl and a new place.

Brody celebrates his birthday in Las Vegas and of course Lauren and her friends are invited too. Meanwhile Heidi has to face more problems at work than she likes.

When Jen wants to be friends again with Lauren, however the dark past starts to haunt everyone. And not everyone likes the past revealed.

Lauren goes out with one of the male models from a photo shoot, leaving Brody to question everything that has developed in the past weeks.

Whitney and Lauren are sent to New York to present their ideas about the big fashion show. Meanwhile Franky tries to fix Brody's and Spencer's friendship.

The Young Hollywood party finally happens and Whitney is in charge. Heidi celebrates her 21th birthday with Spencer. And Audrina might have a new admirer.

Lauren and Whitney have to cover an event for Teen Vogue, where Lauren runs into Heidi and of course they fight again. Later on Heidi tries to make up to Lauren, but Lauren turns her down. Meanwhile Audrina and Justin still struggle in their undefined relationship.

Heidi and Spencer constantly fight about how they should get married. Will they find a solution? Meanwhile Whitney has found a guy that asks her out on a date.

Lauren and Audrina find out that Spencer has a sister. She also pays Spencer and Heidi a visit. When Lauren and Audrina hang out with Brody, they not only run into Spencer's sister, but also run into Justin - with another girl.

Stephanie tells Spencer that Heidi might bail out of the wedding, so Spencer and Heidi fight once again. Lauren and Audrina both have a date.

Broken hearts as far as the eyes reaches: Heidi and Spencer can't agree on their wedding plans while Brody and Lauren both refuse to make the first step.

Lauren and Whitney go to Paris, but the trip is marred for Lauren when she finds out Brody is seeing someone new. Meanwhile, Spencer follows Heidi to Colorado to try to win her back.

After their week in Paris, Lauren and Whitney are back home and have to adjust to the changes and the changes they plan to do.

Loyalty lines are questioned when Stephanie Pratt makes nice with Lauren at FIDM. Plus, Whitney travels to NYC to jump-start her career with People's Republic.

It's Lauren's birthday and for some guests an appearance at her party could mean a lot of trouble. Also from whom will Lauren receive a birthday kiss?

After the much talked about birthday party Lauren had, the talk of the characters on The Hills is Lauren's friendship with Stephanie. Audrina is approached by someone unexpected, much to someone else's discomfort.

Lauren is surprised by a job offer she receives. Meanwhile Heidi enjoys a night out with her friends, until she spots Spencer and things end up in a fight.

Lauren and Lo are looking into the real estate market as they plan to buy a house. Meanwhile, Audrina reconsiders her situation as a single woman.

The girls go out to find a new home. When they find one, the guest list for the housewarming party is subject to more than just one fight.

While Lo and Lauren enjoy living at the house, Audrina feels more and more left out. Meanwhile Stephanie thinks it's time to get rid of Spencer and Heidi prepares her next step in her career.

Lauren tries to uphold her friendship to Audrina, but is it already too late? Meanwhile Spencer tries to win Heidi back and risks her career to do so.

The tension between Lo, Lauren and Audrina continues and soon things reach boiling point.

Stephanie's birthday party is around the corner and so everyone tries to make an appearance. Also things start to change for Whitney.

Whitney's love life starts to heat up while Lauren's starts to cool down. Meanwhile Heidi and Spencer fight.

A blowout trip to Las Vegas turns sour when Audrina snubs Lauren, Brody brings up Stephanie's past and the boys end up in jail.

Brody is still in jail, so the girls try to come up with a way to get him out. Plus Audrina and Lauren finally sit down and talk to each other.

Holly reaches out to Lauren, forcing Lauren and Heidi to reconsider their friendship. Meanwhile, Audrina and Justin's relationship is tested.

When Lauren is away for a couple of days, Stephanie and Doug start dating secretly. How long will that stay a secret though?

Doug and Stephanie have to explain themselves to Lauren. Meanwhile Heidi's mother pays a visit.

Heidi tries to reach out to Lauren. Meanwhile Audrina has a date, but what will Justin say to that?

Spencer sets an ultimatum for Holly to move out. Meanwhile Audrina checks which boy is best for her. Will it be Justin?

Lauren and Audrina travel to Cabo for Brody's birthday, but Audrina's problems with Justin threaten to ruin the festivities. Back in LA, Spencer gives Stephanie's new boyfriend a hard time over dinner.

Audrina wants to make things work with Corey, but finds herself torn when Justin drops by Epic. Meanwhile, Stephanie starts having doubts about her new boyfriend when he fails to defend her in front of Brody.

Audrina suprises Lauren when she moves out, and Heidi disappoints Brent Bolthouse when she invites Spencer to a work event and gets caught having a little too much fun.

Whitney finds romance when she and Lauren head to New York City for fashion week. Back in L.A., Spencer makes things worse for Heidi by approaching Brent to ask for her job back.

Heidi decides to go back to Brent and Sam and ask for her job back. Plus, Holly Montag's crashing at Lauren and Lo's since getting kicked out of her sister's place.

A nasty rumor threatens to end Lauren and Audrina's friendship and Heidi realizes Spencer's been withholding information from her.

Audrina tries to make amends with Lauren after the fall-out. Then it's off to Nana's house where Spencer and Stephanie compete for their grandmother's affection.

In NYC, Whitney has an interview with Diane von Furstenberg and sees Jay. Plus, Lauren says goodbye to her Laguna home and Stephanie makes a difficult decision about Cameron.

Spencer and Heidi ignore the concerns of their families and elope in Mexico. Meanwhile, Whitney says goodbye to Lauren and her life in Los Angeles as she leaves for her dream job in New York City.

The season four finale finds Lauren and Heidi running into each other and are reminded why the once were best friends. Meanwhile, as Heidi's mom pays a visit, the she and Spencer know they must face reality; and Audrina is surprised by Justin with a trip to Palm Springs.

Lauren lands in tears during her surprise birthday party when Heidi rocks the boat by showing up uninvited. Plus, Spencer takes a swing at Stephanie's ex-boyfriend, Cameron.

Heidi and Spencer evaluate their relationship after the bar scene and Lauren scolds Stephanie for pushing Heidi on her.

After Heidi catches Spencer at a nightclub with Stacie the bartender, she demands they go to couple's therapy. Plus, Lauren puts her reputation on the line when she gets Stephanie an interview at People's Revolution.

As Audrina tries to get over Justin, she sees Brody in a new light. Plus, Heidi drags Spencer to couples' therapy and Stephanie has a hard time handling work at People's Revolution.

Things heat up between Audrina and Brody in Hawaii and Heidi's ex-boyfriend, Colby comes for a visit.

The gang make their return to Los Angeles. Meanwhile, Brody and Audrina deal the repercussions from their hookup in Hawaii.

Lauren is put into an awkward situation after Stephanie messes up at work. Meanwhile, Justin calls out Audrina for hooking up with Brody.

Spencer has an important question to ask Heidi's father when he comes for a visit. Meanwhile, Lauren make the decision to fire Stephanie from People's Revolution.

Spenser is asked by Heidi to make amends with Lauren in hopes that she'll attend their wedding. Elsewhere, a recently fired Stephanie has a run-in with Kelly Cutrone, her former boss.

Heidi and Spencer head down the aisle and two unexpected guests manage to attend the ceremony.

Kristin makes a big first impression in The Hills when she gets in a fight with two different women over one guy, works her way to queen bee status and lands a hot date with a motorcycle all in one episode.

Kristin kicks her pursuit of Justin into high gear after Audrina blows her off, while Heidi and Spencer's opposing views on kids causes trouble.

Justin doesn't show up at Brody's party and Audrina has a new target.

Justin tries to make up with Kristin. Heidi thinks something is wrong with Holly.

Heidi and Stephanie sit Holly down for an intervention when she continues drinking. Plus, Kristin gets upset with Justin's head games and Brody and Jayde get into a fight that leads them to reconsider their relationship.

Justin finds himself in hot water after Kristin and Audrina meet. Heidi wants to have a baby, but Spencer has another plan.

Audrina gets her heart broken when Justin ends things for good, it's a war of the exes over Brody, and Spencer considers drastic measures to stop Heidi's baby obsession.

While on a lunch date, Kristin and Brody recall the crazy times they used to have together. After Brody toasts to having a nice lunch without fighting, Kristin mentions that Jayde wants to talk with her. Brody tells Kristin she's out of her mind ...

Kristin and Stacie's girls' weekend in Vegas becomes a threesome when Justin joins the fun. Plus, Spencer panics when he uncovers Heidi's pregnancy scheme.

Kristin is in Malibu packing up her beach house when she tells Stacie she doesn't want to pursue a relationship with Justin Bobby. Kristin says things were perfect when they were in Vegas, but she knows real life isn't like vacation.

Heidi heads home to show her family her post-surgery look, and Kristin's all-night partying begins to worry Audrina, Lo and Stephanie.

Stephanie gets blamed for spreading the rumors about Kristin's drug abuse problems, and Spencer lashes out when his sister approaches him at a party....

Kristin urges Audrina to commit to Ryan, then moves in to get closer to Brody and Spencer causes as scene when he gets angry with Holly at Enzo's party....

Heidi and Spencer's behavior cause their friends and family to make a difficult choice, while Kristin and Brody hook up but agree to stay single.

Brody puts his friendship with Kristin on the line when he starts seeing another girl. Lo sets Stephanie up on a double date....

Kristin has a hard time moving on from Brody. Audrina bumps in to Justin and starts to have doubts about her relationship with Ryan.

When Justin Bobby shows up onstage at a show Audrina, Steph and Lo are at, all the girls are surprised.

Audrina's relationship with Ryan is put to the test when he meets Justin for the first time. Brody sides with Kristin when Allie picks a fight with her.

It's Audrina's birthday and the gang, including Justin, board a boat at Marina Del Ray to celebrate. Elsewhere, Kristin has another run in with Allie at a club where a fight erupts. Also Audrina breaks up with Ryan and Kristin warns McKaela to stay away from her.

The gang heads to Costa Rica for a group surf trip, and Brody gets jealous when Kristin hooks up with a local bartender. Meanwhile, Audrina fights her attraction to Justin, and Stephanie finds herself at odds with the jungle environment

Brody and Kristin have a heart-to-heart, she wants to give their relationship another shot and Stephanie starts seeing someone new.

In the final episode of The Hills, there will be goodbyes, tears, promises, love and heartbreak. Kristin will have to decide if she's going to make a major change in her life, which may force Brody to make a decision about their relationship. Audrina chooses a new, independent life without Justin, but will that be the right choice? Lo weighs whether or not to take the next step with her boyfriend, and Stephanie, for the first time, believes that she's found true happiness.