Posted on Wed Jul 4th, 2012 2:20pm PDT
Happy 4th of July Sean!
While everyone else is celebrating America's birthday at parties and the like, the two-time Oscar winning actor decided to hit the gym in Malibu to burn some lbs. Love the dedication!
There have been recent reports that the 51-year-old actor has rekindled his romance with Petra Nemcova after they were spotted together in Haiti. That's always a good reason to work on your fitness!
SEE THE GALLERY Sean Penn Looks Spent As He Leaves The Gym
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