Morgan!

Morgan Delt, a failed working-class London artist and self-proclaimed fantasist, tries to win back his estranged upper-class wife Leonie, played by Vanessa Redgrave, through a series of bizarre stunts, including dressing up as a gorilla. After these attempts fail, Morgan secures the help of his pro wrestler friend Wally "The Gorilla" to kidnap Leonie again, but she eventually escapes and leaves him in an insane asylum, where he dresses as a gorilla and crashes Leonie's wedding reception.