Barbie in The 12 Dancing Princesses

Barbie is cast as Genevieve, one of the twelve princesses who live with their windowed father King Randolph in a castle. They live a frivolous live, so Randolph brings over his cousin Duchess Rowena to raise them as proper princesses. She makes their lives miserable however and poisons the king, so they flee to a magical world brought to life through a story of their mother. Rowena traps them there, along with Genevieve's friend Derek, and they need to use a goblet to collect mystical water that can cure their father.