There's a Girl in My Soup (1970)

There's a Girl in My Soup
Comedy, Romance
TV personality Robert Danvers, an exceedingly vain rotter, seduces young women daily, never staying long with one. He meets his match in Marion, an American, 19, who's available but refuses any romantic illusions.
Starring
Peter Sellers, Goldie Hawn, Tony Britton, Nicky Henson, Diana Dors, Judy Campbell, Gabrielle Drake, Nicola Pagett, Geraldine Sherman, Thorley Walters
Directed By
Roy Boulting