By Will Robinson
February 03, 2016 at 12:00 PM EST
Neilson Barnard/WireImage

Jessica Chastain is heading back in time for her new movie. The Oscar-nominated actress will play Caroline Weldon, a 19th-century artist and activist from New York who advocated for fair treatment of Native Americans in Woman Walks Ahead.

In 1889, Weldon moved to the Dakota Territory and worked with the National Indian Defense Association to help Sitting Bull protect Sioux land from the U.S. government. She lobbied Washington and acted as translator for Sitting Bull — winning the media epithet “Sitting Bull’s white squaw” — working with him until he was killed.

The Crimson Peak star confirmed her involvement on Twitter, and EW has learned that Nanny McPhee Returns director Susanna White will helm a script written by Peaky Blinders creator Steven Knight. A book of the same title about Weldon and Sitting Bull’s relationship was written by Eileen Pollack in 2002. 

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Chastain appeared in last fall’s The Martian and is slated to star in this summer’s The Huntsman Winter’s War.

The Hollywood Reporter first reported this news.