Phyllis of the Follies (1928)

As a favor to her old chorus pal Mrs. Dexter, Broadway dancer Phyllis Sherwood agrees to play a joke on a client of Mrs. Dexter's lawyer husband. The client, a roving rogue named Clyde Thompson, has a habit of romancing married women and has already made up his mind to make Mrs. Dexter -- whom he's never met -- his next conquest. Phyllis poses as Mrs. D. to throw Clyde off the track, leading to an unending supply of humorous complications.