Nicholas Haden-Guest (born May 5, 1951),[1] known as Nicholas Guest, is a British-American actor who has appeared in various movie and television roles, including that of headmaster Patrick James Elliot in the teen sitcom USA High.

Guest was born in New York City, the son of Peter Haden-Guest, a British United Nations diplomat who later became the 4th Baron Haden-Guest, and his second wife, Jean Pauline Hindes, a former vice president of casting at CBS.

His paternal grandfather, Leslie Haden-Guest, was a Labour Party politician who was a convert to Judaism, and his paternal grandmother's father was Colonel Albert Goldsmid, a British officer who founded the Jewish Lads' and Girls' Brigade and the Maccabaeans.

He is the brother of actor Christopher Guest and writer Elissa Haden Guest, the brother-in-law of actress Jamie Lee Curtis and the half brother of the British-American writer Anthony Haden-Guest.

On November 26, 1989, he married Pamela Ann Guest (née Seamon), an actress and casting director, with whom he had his second daughter.