Abbott and Costello perform the classic "Who's on first?" baseball sketch in their 1945 film "The Naughty Nineties" first performed as part of their stage act. Still find this really funny

William (Bud) Abbott and Lou Costello (born Louis Francis Cristillo) performed together as Abbott and Costello, an American comedy duo whose work in radio, film and television made them the most popular comedy team during the 1940s.