Sean Penn joins The Secret Life of Walter Mitty

Sean Penn is in talks to join Ben Stiller in “The Secret Life of Walter Mitty”, says Deadline.

Penn (“Dead Man Walking”, “Mystic River”) would play “a small but pivotal supporting role” in the remake of the ’40s film.

Kristen Wiig, Adam Scott, Shirley MacLaine and Patton Oswalt also star in the Stiller directed/starring movie.