Maggie Gyllenhaal is the older sister of actor Jake Gyllenhaal, and the two acted together in the film Donnie Darko.
You can also see Maggie in Secretary, Mona Lisa Smile, Happy Endings, Sherrybaby, World Trade Center, The Dark Knight, Crazy Heart, and will be in Hysteria.
White House Down, an upcoming political action thriller, is set to add Maggie Gyllenhaal to its cast. Gyllenhaal will play a secret service agent in the film, which opens in 2013.