Otherwise, "Forget Domani" is heard only in the film's second segment set in Italy circa 1940 and focused on the dalliance between the gun moll (Shirley MacLaine) of an American gangster (George C. Scott) with a local tourist photographer (Alain Delon).

The vocal version of "Forget Domani", credited to veteran Italian vocalist Katyna Ranieri who was Ortolani's wife, is seen performed by a singer in a tavern.

On May 9, 1967, Francis recorded the Spanish rendering of "Forget Domani": "Olvidemos el Mañana", which appeared on her Spanish-language album Grandes Exitos del Cine de los Años 60.

[5] "Forget Domani" has also been recorded by Willeke Alberti ("Elke Dag Denk Ik Aan Zondag" Dutch), Gitte Hænning ("Glöm Bort I Morgon" Swedish also recorded by Ann-Louise Hanson), Don Cornell, Doug Crosley, Karina ("Olvidemos el Mañana" Spanish), Halina Kunicka (pl) ("Zaczekajmy Z Tym Do Jutra" Polish), Eija Merilä (fi) ("Ei Ajatella Huomispäivää" Finnish), Annie Philippe (fr) ("C'est Loin Domani" French) also recorded by Margot Lefebvre (fr), and Tonia ("Ce N'est Pas Loin Domani" French).

Instrumentalists who have recorded "Forget Domani" include Laurindo Almeida, Al Caiola, George Feyer, André Kostelanetz, Enoch Light, Peter Nero, Roger Williams (with the Harry Simeone Chorale), Hugo Winterhalter, and Frankie Yankovic