Audrina Patridge 'Graduating' From The Hills

By Aaron Parsley and Pearl Barraclough

09/06/2009 at 09:30 AM EDT

There is still plenty of drama on the way for Audrina Patridge, who will face off with newcomer Kristin Cavallari as she stirs up trouble when new episodes of The Hills air on MTV starting Sept. 29.

But Audrina, who has signed up for a "spicier, edgier, older"" reality show about her life, is ready to move on from MTV's reality hit.

"It kind of feels like graduating," she says of leaving The Hills. "I'm still really good friends with all the producers and directors and everyone, so it really only feels like a graduation."

Patridge was on hand Thursday for the premiere of her horror film Sorority Row, which opens Sept. 11, at the Arclight theater in Hollywood. She'll play Megan, dubbed "The Princess" of the sorority house, opposite Rumer Willis's character Elle.

Of her upcoming reality show, Patridge said, "I will be working with [reality TV guru] Mark Burnett and we start filming the end of this year, beginning of next."