Birthday: December 3, 1985
Hometown: Allentown, Pennsylvania

How You Know Her: All it took was a role as an airhead high schooler (Mean Girls) to land the East Coast blonde bombshell on every director's most wanted list. She went on to continue her career in TV (she currently has a recurring role on Big Love), before stumbling onto the set of the surprise hit musical-to-film adaptation of Mamma Mia!. We'd write more, but we just found the trailer for her next movie, Chloe, and we're too busy replaying her lingerie scene over and over and over and over...

How's Fame Treating Ya? "Two minutes out of (Manhattan’s) Midtown Tunnel last night I see a taxi cab with my head on it, and I was like, “Wow!” I’m just in a continual state of shock. One day I may wake up and be like, “I didn’t appreciate it enough.” But hopefully that won’t happen." —PopMatters

Amanda's been sharing screen time with some hot numbers, including Megan Fox, Kristen Bell, and Rachel McAdams. We'll take one of each, please!