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'The Good Girl' premiere

Jennifer Aniston with hubby Brad Pitt at the premiere of "The Good Girl." To see more from this event visit InStyle.com

(InStyle) -- The event: The premiere and post-party of "The Good Girl," starring Jennifer Aniston. The famous friend plays Justine, an unhappily married woman who discovers her soul mate in a mysterious younger man, played by Jake Gyllenhaal.

THE GUEST LIST

Aniston and husband Brad Pitt (still sporting that mountain-man beard), Courteney Cox Arquette, Lisa Kudrow, Selma Blair, Amanda Peet, Claudia Schiffer and cast members Gyllenhaal and John C. Reilly.

THE SETTING

The SilverScreen Theatre at West Hollywood's Pacific Design Center. After the screening guests headed downstairs to Astra West, chef Charlie Palmer's new, futuristic lounge and restaurant. Attendees reveled in the all-American fare, munching on cornbread, mac and cheese and cobbler for dessert. Brown-sack goody bags were an eclectic mix of beef jerky, beauty products and a tin of "Good Girl" candy.

YOU GOTTA HAVE FRIENDS

MORE STORIES Aniston: First a 'Friend,' now a 'Good Girl'     TRANSFORMATIONS To see more of your favorite celebrities visit InStyle.com.

"She's one of my best friends in the whole world," said a proud Cox Arquette of Aniston. "I can't even imagine doing 'Friends' without her." Castmate Kudrow crossed the theater to give the star a hug before the film began.

THE GOOD GIRL

The role, which is a huge departure from Rachel Green (no makeup, no designer clothes and a mastered Texan accent), was a challenge for the star. "I love how hard it was to exercise acting muscles that have been dormant," she said. Does she live up to the film's title in real life? "Sometimes," she explained with a smile.