Excellent adaptation of Mark Twain's story about a young prince and a lookalike beggar boy who trade places. The duo are played by real-life twins Billy and Bobby Mauch. They're both very good. Despite receiving top billing, it's nearly an hour in before Errol Flynn shows up. He's lots of fun as you might expect. Claude Rains is great as the villainous Earl of Hertford. He doesn't really get to have scenes with Flynn, however. Fine WB supporting cast includes Alan Hale, Barton MacLane, Henry Stephenson, and Halliwell Hobbes. Spirited, fun adventure story. Despite the length, it never drags. Nice music score by Erich Wolfgang Korngold. Definitely worth checking out.
Review of The Prince and the Pauper
