Toni Simmons (Goldie Hawn) believes that the only reason her married lover won't leave his wife is because of the children. In truth, her lover, dentist Julian Winston (Walter Matthau), doesn't have any children. In fact, Julian doesn't even have a wife - he just tells women he does to avoid getting involved. When Julian does decide to take the plunge with Toni she insists on meeting the first wife and Julian enlists the aid of his long-time nurse/receptionist Stephanie Dickinson (Ingrid Bergman) to play the part.

Toni's Apartment, 252 West 11th Street and West 4th Street, Manhattan.

Mailbox, West 11th Street and West 4th Street, Manhattan.

Guggenheim Museum, 1071 5th Avenue and East 89th Street, Manhattan.

East 55th Street and Madison Avenue, Manhattan.A

General Motors Showroom, 767 5th Avenue and East 59th Street, Manhattan.

West 8th Street (btw MacDougal Street and 5th Avenue) Manhattan.

Record Shop, 30 West 8th Street and MacDougal Street, Manhattan.

Slipped Disc Nightclub, 418 6th Avenue and West 9th Street, Manhattan.

Office, 730 5th Avenue and East 57th Street, Manhattan.