The Grass Is Greener

The Grass Is Greener is a 1960 comedy film directed by Stanley Donen and starring Cary Grant, Deborah Kerr, Robert Mitchum, and Jean Simmons. The film was adapted by Hugh Williams and Margaret Vyner from the play of the same name which they had written and found success with in Londons West End.

A suave, somewhat obnoxious American oil tycoon, Charles Delacro Robert Mitchum, barges into the lady of the manors private quarters, either deliberately or by mistake. He introduces himself, explaining the family name was originally Delacroix but his grandfather tired of Americans pronouncing the X in the name.Delacros attentions to the Countess turn her head. Rather than behave jealously, the Earl invites the American to come visit, along with an equally grating exgirlfriend of Lord Rhyalls, the American heiress Hattie Durant Jean Simmons. ........

Source: Wikipedia