Sibling actors Jake and Maggie Gyllenhaal both studied at Columbia: Jake attended for two years in the late '90s before dropping out to pursue his acting career, and Maggie graduated with a BA in literature in '99. Jake gained critical acclaim for roles in films like "October Sky," "Donnie Darko," and "Brokeback Mountain." Maggie is an indie-film darling known for "Secretary" and "Sherrybaby" and also costarred in the 2008 blockbuster "The Dark Knight," which grossed $1 billion worldwide at the box office.