VIDEO : Jake Gyllenhaal Reveals That Heath Ledger's Death Still Affects Him

Image: universalGyllenhaal and Heath Ledger as Jack Twist and Ennis Del Mar in 2005's 'Brokeback Mountain.' The untimely death of Heath Ledger sent shockwaves through Hollywood in 2008 ? particularly to his Brokeback Mountain costar Jake Gyllenhaal. "Personally, it affected me in ways I can't necessarily put in words or even would want to talk about publicly," Gyllenhaal said. "In terms of professionally, I think I was at an age where mortality was not always clear to me.