Shane Black's upcoming sequel to "Predator" has signed on young actor Jacob Tremblay to join the cast. The 10-year-old star of the award-winning drama "The Room" will play the autistic son of Boyd Holbrook's character. Holbrook plays an ex-Marine who discovers the existence of the Predators. Filming begins next month in Vancouver.The original "Predator" film was released in 1987 and the original sequel in 1990.