The April Fools

A married man enters his boss' apartment to sign papers for a promotion and finds a party of 200 instead. He doesn't fit in, leaves with a woman, spends all night with her, falls in love with her--and finds out she's his boss' wife.

Director: Stuart Rosenberg

Cast:Jack Lemmon , Catherine Deneuve , Peter Lawford , Jack Weston , Myrna Loy , Charles Boyer , Kenneth Mars , Melinda Dillon , Harvey Korman , Sally Kellerman , Gary Dubin , Janice Carroll , Dee Gardner , David Doyle , Susan Barrett , Tani Guthrie , Nancy Howard , Tom Ahearne