- Kelly Sheridan as Barbie/Princess Liana
- Melissa Lyons as Barbie/Princess Liana (singing)
- Cassidy Ladden as Teresa/Princess Alexa
- Maryke Hendrikse as Melody
- Lara Janine as Melody (singing)
- Kathleen Barr as Lydia
- Mark Acheson as Slyder
- Scott McNeil as Troll
- Jeremy From as Prince Jeremy
- Noel Johansen as Prince Ian
- Nicole Oliver as Dori/Maid
- Heather Doerksen as Phaedra/Waitress
- Michael Dobson as Innkeeper
- Ron Halder as Butler
- Linda Sorenson as Old Woman
- Veena Sood as Sparkles/Lily
David Wittels, Barbie & the Diamond Castle, Staff Manager. David Wittels is a professional illustrator from Vista, California. He has been nationally recognized by his sports illustrations & outdoor photography. He loves to travel with his wife and children Brooklyn, Montana, & Jefferson.
David Wittels 