The Milk star has worked tirelessly to raise awareness and money for the impoverished nation since it was struck by a devastating earthquake in 2010, even setting up his own charity, the J/P Haitian Relief Organization.

He spends a huge amount of time in the country - but the tough work is taking its toll on Penn's health.

The star tells Britain's Telegraph magazine, ""You're going up and down hills all day, stressed, eating a lot of c**p. And you tend to drink at night - rum punch - which I'm also trying to curb.""

But Penn is determined to carry on the humanitarian work for as long as possible: ""As long as it's productive, I'll stay down there.""