The Hollywood Reporter reports that teen stars Selena Gomez and Joey King will play sisters in Beezus and Ramona.
The film is an adaptation of the Beverly Cleary Ramona book series.
Gomez will play the role of Beezus. She's the older sister to the upbeat but klutzy, Ramona, who will be played by King.
The film will be directed by Elizabeth Allen from a screenplay by Laurie Craig and Nick Pustay.
Currently, 20th Century Fox has scheduled a March 19, 2010, release.