Robert Klein is an American stand-up comedian, actor, singer and writer. He is best known for his stand-up comedy albums of the 1970s, as well as his appearances in films such as The Owl and the Pussycat and The Last Detail. He has also been a regular guest on late night talk shows, including The Tonight Show Starring Johnny Carson. His stage name, Klein, is a five-letter word that is often used to describe someone who is small or insignificant.