Anton Karas asked a stunned Karas if he would compose the music for the film. Karas protested, saying he had never actually written music. As Karas later told the story, the director insisted and invited Karas to England. The Austrian became homesick and asked to be allowed to return. Reed told him he could—as soon as he had written the music. Under this pressure Karas wrote his Harry Lime theme. The film—with the music a contributing factor—was a gigantic success, and Karas' life was changed drastically. As a result, he toured all over the world and performed for many celebrities, among them
Archie Karas won an additional $3,000,000 from Mr. X. Karas was willing to gamble everything he made and continued to raise the stakes to a level few dared to play at. With a bankroll of $4 million, Karas gambled his bankroll up to $7 million after spending only three months in Vegas. By now, many poker players had heard of Mr. X's losses to Archie. Only the best players dared to challenge him. Karas sat at the Binion's Horseshoe's poker table with 5 of his 7 million dollars in front of him, waiting for any players willing to play for such stakes.