Barbie: A Fairy Secret is a 2011 computer-animated fantasy film directed by William Lau. Produced by Mattel Entertainment and Litton Entertainment in association with Rainmaker Entertainment. It was first released on DVD on March 15, 2011, and made its television premiere on Nickelodeon on April 17, 2011. The nineteenth entry in the Barbie film series, it features the voices of Diana Kaarina, who reprised her role as Barbie, and Adrian Petriw as Ken. The plot has a shared universe with Barbie: A Fashion Fairytale, where Barbie must team up with her frenemy Raquelle to save Ken from marrying a fairy princess and being trapped in a fairy world forever. This is the first Barbie film to be created by Litton Entertainment.