Barbie and the Diamond Castle

In the story that Barbie and her friend Teresa tell, two young women named Liana and Alexa share a simple life in a forest cottage and a love of music. Their friendship is tested when they gain a magic mirror and meet a girl imprisoned within it. To rescue their new friend, they set out for a hidden castle, facing danger along the way. Two puppies accompany them, and the power of song helps them through the journey.

This animated musical fantasy was directed by Gino Nichele and produced by Luke Carroll, Shelley Tabbut and Jennifer Twiner McCarron for Mattel and Rainmaker Entertainment. Kelly Sheridan voices Barbie and Liana, with Melissa Lyons providing Liana's singing voice, while Cassidy Ladden plays Teresa and Alexa. Maryke Hendrikse, Nicole Oliver and Chantal Strand also appear in the voice cast. It is one of the Barbie computer-animated films that followed the series' move into full-CGI storytelling from 2001.

Released in September 2008, the film runs 78 minutes. On IMDb it holds a 6.6 rating from around 5,900 votes, and on TMDB it has a 7.4 rating from roughly 895 votes, suggesting a modest but appreciative audience. It belongs to the family and animation genres and was produced in Canada and the United States.