Sean Penn: Casual Afternoon Stroll in Malibu

Sean Penn takes a walk around his neighborhood with a guy pal on Saturday afternoon (December 21) in Malibu, Calif.

Earlier in the month, the 53-year-old actor was spotted sporting a backwards cap while taking a stroll near his home in Los Angeles.

PHOTOS: Check out the latest pics of Sean Penn

Be sure to catch Sean in the upcoming film The Secret Life of Walter Mitty, which hits theaters on Christmas Day!

Also starring Ben Stiller and Kristen Wiig, the film is about a day-dreamer who escapes his anonymous life by disappearing into a world of fantasies filled with heroism, romance and action.

15+ pictures inside of Sean Penn walking with a friend…