Samantha Morton, Dominic West and Polly Walker have joined Disney's John Carter of Mars, director Andrew Stanton's adaptation of the Edgar Rice Burroughs book series.
The trio joins Taylor Kitsch, Lynn Collins and Willem Dafoe in the film, which centers on a Civil War veteran (Kitsch) who finds himself mysteriously transported to Mars, where he becomes embroiled with the planet's warring people.
Morton plays Sola, the daughter of Dafoe's Tars Tarkas, who must hide her softer side from her warmongering race.
West plays Sab Than, prince of the Zodangans who believes he is entitled to rule Mars.
Walker plays Sarkoja, a merciless, tyrannical Thark.
Stanton wrote the screenplay with Mark Andrews. The film is targeted for a start early next year.