"The Frog Prince" was one of several adaptations of Brothers Grimm fairytales that Lotte Reiniger made in London between 1953 and 1955: others include "The Gallant Little Tailor", "Hänsel and Gretel", "Sleeping Beauty", "Snow White and Rose Red" and "The Three Wishes".
The Frog Prince (1954) is currently not available on any services.
Lotte Reiniger
Demon Slayer: Kimetsu no Yaiba Sibling's Bond
Justice League: Crisis on Infinite Earths Part Two