Boo Boo Stewart

Adorable 15-year-old Boo Boo, whose real name is Nils, stars as werewolf Seth Clearwater in the third installment of the Twilight Saga: Eclipse, out June 30, 2010. But the buzz is already building for this hot up-and-coming star: Boo Boo's been featured in a ton of magazines and blogs, and has appeared on numerous television shows to promote his role in the third Twilight film. We've got all the goods on this rising star, complete with four pages of color photos!