Ryan Lee Stiles (born April 22, 1959) is an American Canadian actor, comedian, and producer whose work is often associated with improvisational comedy. He is best known for his work on the original British series and American version of Whose Line Is It Anyway? and for his role as Lewis Kiniski on The Drew Carey Show. He also played Herb Melnick on the CBS comedy Two and a Half Men and was a performer on the show Drew Carey’s Improv-A-Ganza.