The Magic Sword
Despite being all over the place and rather chaotic and cute, this 1962 Bert Gordon film is a lovely little family flick that seems to borrow from every fantasy story the writer had ever heard, in an eclectic and often bizarre way, the create the most patchwork film you might every encounter, however most sources seem to agree it's based on the legend of St George and the Dragon.
Sir George (Gary Lockwood) is the foster son of Sybil (Estelle Winwood), an elderly witch. Not much is said about his background other than that his parents are dead and he is of "royal blood". He is secretly in love with Princess Helene (Anne Helm), who is kidnapped early in the film by the evil wizard Lodac (Basil Rathbone) who intends on feeding her to his pet dragon. George wants to go on a quest to liberate his lady love, but Sybil believes he is too young, comforting the youth by showing him a magic sword, a steed, a suit of armour and magically frozen knights he will command when he is 21. The impatient George however tricks Sybil into a locked underground compartment and takes off with his magical implements and revived company of knights.