Answer
In "River of No Return," a 1954 Western adventure film directed by Otto Preminger, Robert Mitchum and Marilyn Monroe play opposite each other. The story follows a ranch owner and former gambler, Mitchum's character, who crosses paths with Monroe's character, a saloon singer traveling down a river with her young son, after his raft capsizes. Together, they must navigate the untamed wilderness and face unforeseen challenges along their journey.