Former world boxing champion Mike Tyson and Hafnarfjordur Julius Björnsson, who plays the Mountain in Game of Thrones, have joined the cast of Kickboxer: Retaliation. The film is the sequel to the new version of Kickboxer, and the story still revolves around the fighter who avenges his brother in the first film. The first film's producer and screenwriter Dimitri Logothetis will direct the sequel, and the starring actor Alan Moussi will return.