Today we're celebrating the birthday of Maggie Gyllenhaal, who turns 34 today. The older sister of Academy Award-nominated Jake Gyllenhaal, Maggie got her acting start in the 1992 feature film Waterland. From there, she appeared in bit parts until making a name opposite her brother in the 2001 cult favorite, Donnie Darko. However, she truly hit her big break in 2006's SherryBaby, for which she received rave reviews for her performance. Since then, she's starred in major films like 2006's Stranger Than Fiction, 2008's The Dark Knight and 2009's Crazy Heart, for which she earned her lone Academy Award nomination. She'll next appear in the 2012 films Learning to Fly and Voice from the Stone. So, to celebrate her birthday, I've listed my five favorite of Maggie's roles. Please help me in celebrating and wishing her a happy birthday!