How many movies have Bud Abbott and Lou Costello acted in together?

They have worked on 43 movies together! Their first movie together was One Night in the Tropics (1940) while their highest rated movie together was Abbott and Costello: Funniest Routines, Vol. 1 (2007). They have not worked together since Classic Movie Bloopers: Uncensored (2013). They are most known for their comedy films together.