Mischa Barton: Amanda Edwards/Getty Images

Mischa Barton

SHE PLAYS Marissa Cooper, a pampered Southern California teen whose perfect life is destined to crumble

WHERE YOU'VE SEEN HER The former ''All My Children'' star and current Neutrogena girl was the best friend-turned-love interest of Evan Rachel Wood's Jesse Sammler on ABC's ''Once and Again.''

WHY SHE'S HOT She's got the acting chops to wrestle with her character's drinking problem AND she could pass for Katie Holmes' sultry kid sister.