Kevin James has lost so much weight, he looks like "a young Jan-Michael Vincent," said Vince Vaughn, his costar in 'The Dilemma.' It all started during a restaurant scene. "We were having some pasta, some steaks and we decided maybe we should lose some weight," the actor explained on 'Late Show' (weeknights, 11:35PM ET on CBS).

"Kevin had ambitions of doing some action films in the future. I didn't share that ambition, but I was supportive of him," Vaughn said.

However, a plate of nachos ("with some processed cheese") better complemented Vaughn's character. "This old method man over here," he said, pointing to himself, "took it home with him ... I get so lost in my work I couldn't tell the difference," he joked.