Cheetah Girl Kiely Williams is breaking out on her own. She's been added to the cast of Columbia Pictures' "The Bunny House" (working title), starring Anna Faris, which is being produced by Adam Sandler's Happy Madison Prods. Sandler auditioned the starlet himself, and her first day of filming is today in Los Angeles. The film also stars "American Idol" runner-up Katharine McPhee and Rumer Willis.

This marks yet another success story for the Walt Disney Co.'s Cheetah Girls franchise, which started out as a series of books, then turned into a Disney made-for-TV movie, then a real pop band, then a big-screen film. The Cheetah Girls grossed more than $26 million for 86 concerts dates form September-February.

The group's new album, "TCG," will be released Sept. 25. As part of the campaign to promote the record, the Cheetah Girls will appear on 50 million boxes of Kraft Macaroni & Cheese. New merchandise also will be added in the fall, including Cheetah Girls dolls, a singing poster, a Nintendo video game and an exclusive bear offered at Build-A-Bear.