​From Wikipedia, the free encyclopedia. Louis Francis Costello (March 6, 1906 – March 3, 1959) was an American actor and comedian best known as half of the comedy team of Abbott and Costello, with Bud Abbott. Costello was famous for his bumbling, chubby, clean-cut image that has appealed to many Americans over the decades, and for his shouted line of "HEEEEYYY ABBOTT!!." Description above from the Wikipedia article Lou Costello, licensed under CC-BY-SA, full list of contributors on Wikipedia