Top billed Errol Flynn isn't, oddly enough, the lead in this exciting adaptation of Mark Twain's novel. The real stars are the Mauch twins, Billy and Bobby, who play a young peasant and a young prince who bear a remarkable resemblance to each other and, through a series of events, end up switching places. The twins are great choices to play the leads -- much better than most child actors. The villain is Claude Rains; when he finds out about the switch, he exploits it for his own political gain. There's a dash of swashbuckling action, but the development of the characters is, thankfully, this film's first priority.