Factual error: Actual showboats were very rarely self-propelled. The engine and boilers needed to propel the vessel would have taken up the space needed for the stage, backstage area, and auditorium. As a result, they had to be towed everywhere by a towboat.
Show Boat (1951)
1 mistake - chronological order
Directed by: George Sidney
Starring: Ava Gardner, Howard Keel, Kathryn Grayson
Cap'n Andy Hawks: I guess you cut quite a figure before the footlights.