1. Daniel Radcliffe
The Harry Potter star never finished high school (just like Harry never technically finished Hogwarts). Harry Potter may have been a top student at Hogwarts, but his portrayer can’t say the same for his educational experience. “I’m kind of sure of myself intellectually. And I know I wouldn’t have been if I had stayed in school because, before I did Potter, my confidence had been more or less destroyed by a couple of teachers. So I had it all restored by the people who taught me on the films,” Radcliffe told Parade in 2009 of dropping out.