It starred Errol Flynn, twins Billy and Bobby Mauch in the title roles, and Claude Rains and has been described as "a kids' fantasy.

The second theme of the final movement of Erich Wolfgang Korngold's violin concerto was drawn from the music he composed for this film.

Hendon's opinion of Edward's story changes after Hertford, fearing for his power if the real king lives, instigates an attempt to assassinate the boy.

Warner Bros had Billy and Bobby Mauch under contract, and had used them separately in Anthony Adverse, The White Angel and The Charge of the Light Brigade.

[1] Frank S. Nugent of The New York Times wrote, "Bobby and Billy justify their twinship completely, not merely by investing the Twain legend of mistaken royal identity with a pleasing degree of credibility, but by playing their roles with such straightforwardness and naturalness that the picture becomes one of the most likable entertainments of the year ...

"[9] Variety published a negative review, reporting: "The fragile plot scarcely holds together a full length screen play", and suggesting that its running time could have been trimmed at the beginning so Flynn could enter the film earlier.