This is an oddly mangled version of the famous Mark Twain novel. Historically, Edward VI became king at age 10, and had been dead for three years when he would have been Mark Lester's age (18) at the making of this film. Why director Richard Fleischer chose to transmute the title characters from children to late adolescents is a mystery to me. It makes their bumbling in their respective reversed roles more pathetic than sympathetic. Mark Lester's performance, in both roles of prince and pauper, I thought was distinctly undistinguished in view of his earlier achievements. Perhaps he was already thinking of his medical career ahead. Now having said all that, the strength of this movie, such as it is, lies in its powerhouse supporting cast: Oliver Reed, Raquel Welch, Ernest Borgnine as the abusive father, George C. Scott as a brigand, Rex Harrison, David Hemmings, and even Charlton Heston as Henry VIII -- WOW! As I watched, I wished they had just left the protagonists out altogether and let these master actors tell the story of Sixteenth Century Tudor intrigues. To view or not to view? It's a toss-up: you decide.