is a 1972 American/Italian international co-production comedy film produced and directed by Billy Wilder, and starring Jack Lemmon and Juliet Mills.

Wendell Armbruster Jr. embarks on a journey to Ischia to claim his father's body, killed in an automobile accident during an annual trip to the resort island in the Bay of Naples.

For the past decade, Baltimore industrialist Wendell Armbruster Sr. has spent a month each year at the Grand Hotel Excelsior, ostensibly for the therapeutic mud baths.

To Wendell's surprise, he discovers that his father ("Willie") had been having an affair with Pamela's mother ("Kate") throughout those ten years, despite maintaining a marriage in Baltimore.

Already aware of this clandestine annual meeting between their parents, Pamela suggests burying them together on Ischia, a proposal that does not resonate with Wendell.

Wendell wants to take his father’s remains back home for a formal memorial, unrealistically scheduled in 3-days’ time, to be broadcast to employees, the Coast Guard, and US dignitaries (including Henry Kissinger) as befits his status.

As the hotel manager, Carlo Carlucci, plans a funeral and the transport of Wendell Sr.'s remains, the duo faces constant delays due to the bureaucratic hurdles and the leisurely pace of work inherent in Italian traditions.

Arrogant and impatient of the red tape, Wendell acts out rudely to Pamela, the hotel staff, and Italian administrators.

Wendell suspects Pamela initially, but they soon discover that the Trotta family, whose vineyard suffered damage in the car accident, has stolen the remains.

Simultaneously, the hotel valet, Bruno, deported from America and seeking to return, attempts blackmail using compromising photos of "Willie and Kate."

As they re-create their parents’ traditional activities together during their annual flings―prodded by the hotel staff who stage events in fond tribute to the popular deceased couple―Pamela’s caring nature mollifies Wendall’s arrogance and they fall in love.

Bruno is shot dead by Anna, a pregnant chambermaid, when she learns that he wants to avoid marrying her and instead is plotting to return to the US with money raised by blackmail.

Growing sympathetic to the clandestine couple’s long commitment to each other, Wendell accedes to Willie and Kate being buried together in the Carlucci family's burial vault.

Ironically fulfilling blackmailer Bruno's wish of going back to the America, they place his remains in a coffin marked as Wendell Senior's.

"I loved Billy Wilder just calling me and asking me to be in his film," the actress recalled, "no lawyer or agent, his voice, not asking for an audition or a screen test.

"[10] The British television network Channel 4 has called the film "a rare instance of the travel comedy - never an easy thing to pull off - succeeding without recourse to old racial stereotypes .

As Lemmon and Mills strip off to reveal pale white skin and flabby fat, you can't help feeling that the resolutely misanthropic director is somewhat appalled by the realities of his characters' bedroom antics.

Diamond for Best Screenplay, Juliet Mills for Best Actress, Clive Revill for Best Supporting Actor, and the film itself for Best Motion Picture (Musical or Comedy).

Wilder and Diamond were nominated for the Writers Guild of America Award for Best Comedy Adapted from Another Medium but lost to Jay Presson Allen for Cabaret.