Sweethearts and Wives is a 1930 American pre-Code mystery film with comedic elements produced and released by First National Pictures and directed by Clarence G. Badger.

Billie Dove plays the part of an aristocrat who tries to prevent her sister's divorce by attempting to recover of a diamond necklace, which is being used as incriminating evidence against her.

Blackmer is in an awkward position himself as he is having an affair with a married woman, played by Leila Hyams, and they are both fearful lest her husband learn of this escapade.

The police and Clive Brook soon arrives at the house, playing the part of a divorce detective, who is secretly working to find the diamond necklace to return it to the husband of the woman who lost it.

In the end, Dove manages to retrieve the necklace back and save her sister from a scandalous divorce.