Tonight or Never is a 1931 American pre-Code comedy film directed by Mervyn LeRoy and starring Gloria Swanson, Melvyn Douglas (in his screen debut) and Boris Karloff. The film is inspired by the Hungarian play of the same name, written by Lili Hatvany and performed on Broadway between November 1930 and June 1931. The title is derived from the name of a perfume by Offenthal, released in 1927.

Plot

Nella Vargo is a Hungarian prima donna whose latest performances include singing Tosca in Venice. Although she is praised by the audience, her music teacher Rudig feels that she cannot be the greatest opera singer in history until she performs in New York City. When she is criticized for not putting her soul into the song, she gets mad, until she suddenly notices a mysterious man walking on the street. She becomes smitten with the man, until Rudig claims that he is a gigolo whose latest client is Marchesa Bianca San Giovanni, a former diva with a notorious past.