Producer Jacques Bar was making a heist film starring Jean Gabin with backing from MGM, titled Any Number Can Win (1963). Gabin’s co-star was going to be Jean-Louis Trintignant until Delon lobbied Bar for the role. He took the film’s distribution rights in certain countries instead of a straight salary. Because such an arrangement had never previously been made in France, it became known as “Delon’s method”. Delon’s gamble paid off handsomely, with Jean Gabin later claiming that Delon earned 10 times more money than he did as a result. However, in 1965, Delon claimed “no one else has tried it since and made money”.
The experience gave Delon a taste for producing. He signed a five-picture deal with MGM, of which Any Number Can Win was the first. His reputation was further enhanced when he worked with Visconti again in Il Gattopardo (The Leopard) with Burt Lancaster and Claudia Cardinale. It was the seventh biggest hit of the year in France. Any Number Can Win was the sixth. The Leopard was widely screened in the U.S. through 20th Century Fox. Delon was now one of the most popular stars in France. He starred in a swashbuckler, The Black Tulip (1964), another hit.