Mr. Lucky is a 1943 romance film directed by H.C. Potter, starring Cary Grant and Laraine Day. It tells the story of the attraction between a shady gambler and a wealthy socialite in the days prior to the United States entering World War II.
Joe the Greek Adams Cary Grant is a gambler and grifter with a couple of problems. First, he and his treacherous partner Zepp Paul Stewart have received draft notices to join the army in preparation for World War II. Fortunately, he has a solution. One of his underlings, Joe Bascopolous, has just died, and his status was 4F unfit to serve. So one of them can dodge the draft by taking his identity. They gamble for it Zepp cheats, but Joe wins anyway. As it turns out, Zepp fails his physical examination anyway.The other problem is a lack of money to bankroll his gambling ship. He talks the head of the local War Relief organization, Captain Veronica Steadman Gladys Cooper, into authorizing him to run a charity casino, promising to raise enough money to outfit a relief ship, despite the suspicions of her lieutenant, wealthy socialite Dorothy Bryant Laraine Day. ........
Source: Wikipedia