Once Upon a Time (German: Maria d'Oro und Bello Blue) is a 1973 West German-Italian animated musical film written and directed by Roberto Gavioli [it] and Rolf Kauka.

He loses the stag but stumbles upon Mary-Lou bathing in the woods and viciously chastising Maria, who is waiting on her.

All girls of marrying age quickly find garnet stone necklaces and rush to the palace.

Maria agrees to stay and help Mrs. Holle with her chores, but Mary-Lou leaves to find her way back.

In the end, Mary-Lou reluctantly returns to the house, and Mrs. Holle sends both girls back home.

Maria's clothes transform into a beautiful white gown, and the garnet stone necklace appears around her neck.

A comic book adaptation, drawn by Gino Gavioli (the director's brother), was published in Kauka's magazine Fix und Foxi shortly before the film's release.

Once Upon a Time is also known as Der Zauberstein ("The Garnet Stone") in German, and Cinderella's Wonderland in the UK.