William Leyden (February 1, 1917, in Chicago, Illinois – March 11, 1970, in Hollywood, California) was a television game show host and announcer who emceed six game shows, including It Could Be You (1956–61), Your First Impression (1962–64, with Dennis James), and You're Putting Me On (1969). In addition, he hosted movies on KTTV, and played small roles in a handful of films, including Jerry Lewis's The Patsy (1964). During World War II Leyden served in the Marine Corps.