They All Laughed

They All Laughed is a 1981 film directed by Peter Bogdanovich and starring Audrey Hepburn, Ben Gazzara, John Ritter, Colleen Camp, Patti Hansen, and Dorothy Stratten. The movie was based on a screenplay by Bogdanovich and Blaine Novak. It takes its name from the George and Ira Gershwin song They All Laughed.

Detective John Russo Ben Gazzara attempts to cheat on his girlfriend, country singer Christy Miller Colleen Camp, with a blonde taxi driver he calls Sam Patti Hansen, with the connivance of his colleague Arthur Brodsky Blaine Novak. Russo has met the taxi driver en route from a meeting at which he is been assigned to follow Angela Niotes Audrey Hepburn, wife of a European tycoon.Detective Charles Rutledge John Ritter falls in love with Dolores Martin Dorothy Stratten, whose husband has also hired him to spy on her. Charles is cautioned against this infatuation by his buddy Arthur. Feeling slighted by Russos infidelity, Christy throws herself at Charles, but she ultimately falls in love with Doloress extramarital paramour Jose played by Sean Ferrer, who is Audrey Hepburns son in real life. ........

Source: Wikipedia