How to Steal a Million is a comedy with a happy ending which was given to The Husband, who loves such things, by The Younger Son. This 1966 film is directed by William Wyler and stars Audrey Hepburn, Peter O'Toole, Eli Wallach, Hugh Griffith, Charles Boyer and Jacques Marin.
Here's the first part:
The New York Times praises it and says, "Cheers all around for everybody". EW has a mixed review, though they like the actual heist scene. DVDTalk says it "just misses, though not for lack of talent or effort" and says, "though it's no worse than painless, passable entertainment, it also leaves you wanting more." It get a 100% rating at Rotten Tomatoes.