Abbott and Costello
"Who's on First?"
"Who's on First?" is Abbott and Costello's signature routine. Time magazine (December 26, 1999) named it the best comedy routine of the 20th century. The sketch was based on other earlier burlesque wordplay routines. They began honing the routine shortly after teaming up in 1936, and performed it in vaudeville in 1937 and 1938. It was first heard by a national radio audience on March 24, 1938 when the team were regulars on the Kate Smith radio show. By then, John Grant had been writing or adapting other sketches for the team and may have helped expand "Who's on First?" prior to its radio debut. He stayed on as their head writer into the 1950s.
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