Jemal Countess / Getty Images Channing Tatum, 45, is a known Hollywood prankster. And in a new interview, his co-star Amanda Seyfried detailed his grossest prank to date. “He peed on my leg once without me knowing,” Seyfried, 40, told Deadline . The Oscar-nominated actress didn’t “realize at first,” but quickly looked up to see Tatum peeing on her leg. Read more at The Daily Beast.