Over the years, Frank Oz has won us over as the man behind some of history's greatest puppets. There's Cookie Monster, Bert, Grover, Fozzie Bear, Miss Piggy and, of course, Yoda, everyone's favorite pint-size Jedi master. Just like all of us, Oz loves the iconic Star Wars character, but if you ever meet him you should know he's got one simple rule: he won't do the voice.