Nolan is known for using the same actors in his films, most notably Michael Caine and Christian Bale. There are a few reasons why Nolan chooses to work with the same actors time and time again. First, he knows that they are reliable and will always give a great performance. Second, he has a great working relationship with them and they understand his vision for the film. Finally, by using the same actors, Nolan creates a sort of repertory company that gives his films a unique flavor.