William "Bud" Abbott and Lou Costello were an American comedy duo whose work in vaudeville and on stage, radio, film and television made them the most popular comedy team during the 1940s and early 1950s. Their patter routine "Who's on First?" is considered one of the greatest comedy routines of all time and set the framework for many of their best-known comedy bits.
After working as Allen's summer replacement, Abbott and Costello joined Edgar Bergen and Charlie McCarthy on The Chase and Sanborn Hour in 1941, while two of their films (Buck Privates and Hold That Ghost) were adapted for Lux Radio Theater. They launched their own weekly show October 8, 1942, sponsored by Camel cigarettes.
On December 8, 1941, a day after the attack on Pearl Harbor, Abbott and Costello had their prints set in concrete at what was then "Grauman's Chinese Theatre". In 1942, they were the top box office draw with four films earning a total of $10 million. They remained a top ten box office attraction until 1952.
In 1947 Abbott and Costello moved the show to ABC (the former NBC Blue Network). During their time on ABC, the duo also hosted a 30-minute children's radio program (The Abbott and Costello Children's Show), which aired Saturday mornings, featuring child vocalist Anna Mae Slaughter and child announcer Johnny McGovern. (Source: wikipedia.org)