Timeless Tales: The Ugly Duckling (1990)

Scorned for looking different, a poor little Ugly Duckling is abandoned when his family flies south for the winter. The duckling is befriended by the warmhearted Runabout Rabbit, but he soon finds that he doesn't fit in with bunnies. But after a miraculous change, the Ugly Duckling learns that sometimes being different can be beautiful.

Unfortunately the movie Timeless Tales: The Ugly Duckling is not yet available on HBO Max.