Gents Without Cents (1944)

The Stooges play actors hoping to make it big with their "Niagara Falls" routine, but always slip up when they get to the "inch by inch" line. They soon meet three dancers Flo, Mary and Shirley and land a job performing at a shipyard. The Stooges' act is a success and, after another routine, the boys marry the girls. The film ends with the couples going on a honeymoon in (where else?) Niagara Falls.