Radio comedy began in the United States in 1930, and got a much later start in the United Kingdom because many of the British comedians (such as Charlie Chaplin and Stan Laurel) emigrated to the U.S. to make silent movies in Hollywood, and the American comedians who did not become dramatic actors migrated to radio. Raymond Knight launched "The Cuckoo Hour" on NBC in 1930, along with the 1931 network debut of Stoopnagle and Budd on CBS. Comedians such as Fred Allen, Jack Benny, Judy Canova, Bob Hope and Red Skelton were top-rated in the decades that followed. Even after the big name comedians moved to television in the 1950s, radio comedy continued, notably from Bob and Ray (1946–1988), The Firesign Theatre (1966–1972), and segments heard on NBC's "Monitor" (1955–1975).