In the film, Astaire plays a struggling actor who gets a chance to star in a Broadway musical. He is initially reluctant to take on the role, but eventually embraces it with his signature style of dance and joy. There are a few iconic scenes where he hops and dances down streets in the film, including the famous "Dancing in the Dark" sequence.
Do any other details from the movie come to mind? This might help confirm if "The Band Wagon" is the right movie.