Tom Hanks and Sandra Bullock have already been cast in Stephen Daldry's upcoming adventure. Horn will play Oskar Schell, a nine-year-old boy who lost his father in the 9/11 attacks, and later finds a key amongst his dad's belongings. The story follows Schell as he tries to find the lock that matches this key.
Director Stephen Daldry was searching for a young boy with exceptional intelligence to play Oskar Schell when he found Thomas Horn, who won $31,800 in prize money during Jeopardy!'s Kid's Week in October.