Frank Oz ( born Richard Frank Oznowicz on May 25 , 1944 ) is an American puppeteer and filmmaker who is well-known for his work on The Muppets , Star Wars , and Sesame Street . He also directed some popular films , such as Little Shop of Horrors and Dirty Rotten Scoundrels . Frank Oz ( born Richard Frank Oznowicz ; May 25 , 1944 ) is a British-born American film director , actor , voice actor and puppeteer who is known for creating and performing the characters Miss Piggy and Fozzie Bear in The Muppet Show and for directing films including the 1986 Little Shop Of Horrors remake and Dirty Rotten Scoundrels .