Hollywood Hotel (1938)

After losing a coveted role in an upcoming film to another actress, screen queen Mona Marshall (Lola Lane) protests by refusing to appear at her current movie's premiere. Her agent discovers struggling actress Virginia Stanton (Rosemary Lane) -- an exact match for Mona -- and sends her to the premiere instead, with young musician Ronnie Bowers (Dick Powell). After various mishaps, including a case of mistaken identity, Ronnie and Virginia struggle to find success in Hollywood.