The film, which is set to be directed by original helmer Christian Carion, centers on a man (McAvoy) whose only son goes missing and his journey to the town where his ex-wife (Foy) lives in search of answers.
Carion directed his original film the same way with his lead star improvising the role.
STXfilms has acquired the rights to adapt the French thriller My Son into an English-language pic and has tapped James McAvoy (It: Chapter Two, Dark Phoenix) and Claire Foy (The Crown, The Girl in the Spider’s Web) to lead the remake.
“We’re thrilled to be working with Christian to create My Son for worldwide audiences,” Adam Fogelson, STXfilms Motion Picture Group Chairman, said in a statement.