Kenneth Branagh chats about his role in 'My Week with Marilyn'

It's called "My Week with Marilyn." It's a new movie showcasing the late screen siren back in the 1950s. But, there's more to Marilyn Monroe than we know: A history of insecurity and tension on set.

The movie shows a clash of acting approaches between Monroe and famous actor and director Sir Laurence Olivier.

This morning on American Morning, Kenneth Branagh who played "Sir Laurence Olivier" and has been nominated for a Golden Globe for "best supporting actor" for his performance, talks about his experience acting in the movie.