Photo Credit: iVillage
The Source Code star, 30, tells iVillage exclusively that the best part of being single is getting to bond with his niece Ramona, the 4-year-old daughter of sister Maggie Gyllenhaal. "I get to spend a lot time with my family," the actor says. "I love being an uncle, and I love spending time with my niece. That's just the most important thing to me.
Watch our exclusive video (above) to find out why Gyllenhaal's new drama (which hits theaters April 1) changed his perspective on life and why he loves injecting comedy into serious films.