Ad-agency president Dan Edwards goes to Mexico to celebrate his nineteenth wedding anniversary and winds up getting divorced by mistake, whereupon his wife Valerie marries his best friend Ernie Brewer by mistake.
| Actor | Role |
|---|---|
 Frank SinatraDan Edwards | Dan Edwards |
 Deborah KerrValerie Edwards | Valerie Edwards |
 Dean MartinErnie Brewer | Ernie Brewer |
 Cesar RomeroMiguel Santos | Miguel Santos |
 Hermione BaddeleyJeannie MacPherson | Jeannie MacPherson |
 Tony BillJim Blake | Jim Blake |
 John McGiverShad Nathan | Shad Nathan |
 Nancy SinatraTracy Edwards | Tracy Edwards |
 Davey DavisonLisa Sterling | Lisa Sterling |
| MMichel PetitDavid Edwards | David Edwards |
 Trini LópezTrini López | Trini López |
 Joi LansingLola | Lola |
| DDarlene LuchtBunny | Bunny |
 Kathleen FreemanMiss Blight | Miss Blight |
 Flip MarkRollo | Rollo |
 Sigrid ValdisKitty | Kitty |
 Karen NorrisAssistant (uncredited) | Assistant (uncredited) |
 Byron FoulgerMr. Bruno (uncredited) | Mr. Bruno (uncredited) |
 Marie GomezLobby Senorita (uncredited) | Lobby Senorita (uncredited) |
 DeForest KelleyMr. Turner | Mr. Turner |