Mr. Lucky

Mr. Lucky was directed by H.C. Potter and was released in 1943. This romantic comedy stars Cary Grant and Laraine Day. Cary grant plays a gambler who owns his own casino boat which he intends to set sail on. Unfortunately he gets drafted to the military so he is forced to take on an alias of a former gangster to avoid the draft. In order to get his boat up in running he must round up $50,000. He plans on ripping off a war relief foundation until he falls in love with Lairane Day's character and then everything changes. The movie currently has no rating on Rotten Tomatoes so you will just have to judge it for yourself. 

http://www.tcm.com/mediaroom/index.jsp?cid=31759