Former The O.C. star Mischa Barton has replaced British actress Sienna Miller in the cast of new movie Bhopal: A Prayer For Rain.

The Alfie actress had been lined up to take the female lead in the film, which focuses on the story of a chemical spillage in India.

But now 22-year-old Barton will join former West Wing star Martin Sheen in the picture, which is due for release later this year.

-Check out Mischa Barton's Filmography
-More Mischa Barton Pictures

(This news article provided by World Entertainment News Network)