Jai Courtney broke onto the action scene alongside a seasoned vet of the genre, Bruce Willis. In A Good Day to Die Hard, Courtney plays John McClane's grown son, an undercover CIA agent stationed in Moscow. Courtney more than keeps up with Willis, and in fact, makes him look his age. Could the next Die Hard installment (insert "the movie franchise that won't die" joke here) see young McClane take over the throne from his retired dad? We'll have to wait and see, but look out for Courtney up next in another big franchise, Divergent.