Greg Proops, American comedian, actor, and screenwriter
Gregory Everett Proops (born October 3, 1959) is an American actor, stand-up comedian and television host. He is widely known for his work as an improvisational comedian on the U.K. and U.S. versions of Whose Line Is It Anyway? He also performed on Drew Carey's Green Screen Show and voiced the title character on the animated children's show Bob the Builder from 2005 to late 2007.