STXfilms has taken the North American and other foreign rights to the remake of the French thriller to be directed by Christian Carion.

Claire Foy and James McAvoy are set to star in My Son, the missing person thriller from ErosSTX Global Corp. and a remake of the 2017 French movie Mon Garçon.

French director Christian Carion will direct the English-language adaptation for STXfilms after he helmed the original French thriller that starred Guillaume Canet as a father who will do anything to get his young son back.

The My Son remake will see McAvoy play the father whose son goes missing, leading him to travel to the town where his ex-wife (Foy) lives in search of answers to the mystery.

To play a man who doesn’t know what’s ahead of him, McAvoy will not be given a script or dialogue. Instead, he will improvise on set as each scene unfolds, as was the case in the original French film, with the rest of the cast and crew for the English language remake being aware of the scenes.

“James will be doing the detective work of the film in real time, on camera, to create real tension for this thriller. We like to support bold and innovative storytelling like My Son, and Claire could not be a more spectacular or exciting choice for this film which is certain to thrill audiences,” Adam Fogelson, chairman of the STXfilms Motion Picture Group, said in a statement as he unveiled the project.

ErosSTX said STXfilms has taken the rights for the English-language remake for North America, the U.K., Italy, Benelux, Latin America, Spain, Australia and China. The film will begin production in early November in Scotland.

The My Son remake will be produced by Carion, Laure Irrman, Vincent Maraval, Brahim Chioua, Rebecca O’Brien and Marc Butan.

Mad River International represents the film’s foreign rights.