Natasha Poly wore Fall Winter 2012-2013 look 35 emerald green printed velvet long sleeved evening gown with plunging v-neck detail.
Clara Paget wore a Cruise 2012 black silk jersey one shoulder evening gown with black and gold flower detail with 18kt yellow gold bamboo bracelet and matching earrings, black evening sandals with gold chain detail and black singray evening clutch.
James Woods wore a Made to Order black peak lapel one button Signoria tuxedo with white dress shirt, black satin bowtie and black leather lace ups.
Paul Bettany wore a Made to Order black shawl lapel one button Signoria tuxedo with white dress shirt, black satin bowtie and black patent leather loafers.
Simon Curtis wore a black tuxedo with white dress shirt, black silk tie and black leather lace-ups.
Andrew Dominik wore a midnight blue notch lapel two button Marseille suit with white dress shirt, midnight blue satin bowtie and black leather lace-ups.
Other guests included Robert De Niro, Patrizio Di Marco, Francois Henri-Pinault, Ennio Morricone, Alexander Payne.
Once Upon a Time in America originally premiered in Cannes in 1984. With Gucci's support, the film was restored by Cineteca di Bologna at L'Immagine Ritrovata Laboratory in association with Andrea Leone Films, The Film Foundation, and Regency Enterprises. For the new restoration, Warner Bros. Motion Picture Imaging (MPI) scanned the original camera negatives of the 3 hour and 49 minute version and the picture was digitally restored at 4K resolution at Cineteca di Bologna's lab L'Immagine Ritrovata.