The fourth season of The Hills, an American reality television series, consists of 20 episodes and was broadcast on MTV. It aired from August 18, 2008, until December 22, 2008. The season was filmed primarily in Los Angeles, California, with additional footage in New York City, New York; Las Vegas, Nevada; Italy; and Cabo San Lucas, Mexico. The executive producer was Liz Gateley.
The Hills focuses on the lives of Lauren Conrad, Audrina Patridge, Whitney Port, and Heidi Montag. During the season, Conrad's distaste for Montag's boyfriend Spencer Pratt continues to inhibit reconciliation between the women. Meanwhile, Patridge is concerned that her new housemate Lo Bosworth is straining her relationship with Conrad. The season finale saw Port relocate to New York City to accept employment with Diane von Fürstenberg, while Montag and Pratt elope.
Upon the conclusion of the season, Port was commissioned her own spin-off series The City, which originally chronicled the lives of her and friends Olivia Palermo, Jay Lyon, Erin Lucas, and Adam Senn. Additionally, rumors were widespread that Conrad wished to leave the series to pursue other career opportunities, though she made her final appearance on the series during the mid-season finale of the following season.
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.
Brody attacks Stephanie and insults her, just before he's arrested.
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.
Justin goes MIA. Holly calls Lauren, but how will Heidi and Spencer react to that?
Lauren leaves for family vacation, and things in Los Angeles go awry. Stephanie dates Doug behind Lauren's back, and Audrina gets friendly with Heidi.
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.