You’ve got to feel bad for Henry Winkler—he really did think he was doing the right thing when he turned down the lead role of Danny Zuko in Grease. In a 2007 interview, Winkler divulged: “I was asked to be in Grease. But I decided I didn't want to be typecast,” he explained, referring to his longtime role as Fonzie in Happy Days. “But what I didn't realize was that I already was…that's why John Travolta went on to buy his own plane and I just went home.” Had he taken it, though, who knows who would have portrayed the Bluth family lawyer Barry Zuckerkorn in Arrested Development? That’s an important role!