Abbott and Costello was a famous American comedy duo consisting of Bud Abbott and Lou Costello. They gained popularity in the 1940s and 1950s through their radio shows, television appearances, and films. Their comedic style often featured witty wordplay, misunderstandings, and humorous routines, with one of their most famous sketches being "Who's on First?" The duo's success led to numerous films, including "Buck Privates" and "Abbott and Costello Meet Frankenstein." They became iconic figures in American comedy, influencing many comedians who followed. Their legacy continues to be celebrated in various forms of media, showcasing their timeless humor.