Jim Henson's The Storyteller
The True Bride
S1 E6:
A girl who was adopted by an abusive troll finally is freed with the help of a white lion. When her betrothed does not return after a trip, the girl is grief-stricken to learn that the troll's sister had put a spell on him and plans to marry him. The white lion appears again and helps the girl by giving her three magical gifts. But how can she use them to convince her bewitched love that she is his true bride?