Dave Benett/Getty Images, Tim Whitby/Getty Images
James and Oliver Phelps
James and Oliver Phelps stole our hearts as Fred and George Weasley, the hilarious older brothers of Ron and Ginny. While the twins may be hard to tell apart on-screen, the two couldn't be more different in real life. "We've learned to watch each other's backs, but we have pretty different personalities," James told People. "I tend to joke around a bit more, while Oliver is more sensitive." After finishing up on the set of Harry Potter, the dynamic duo retired their bold ginger hairstyles and three-piece suits in exchange for their natural brown hue and casual jeans and polos.