After Sheen, 45, revealed to UsMagazine.com that he planned to accompany Penn to Haiti, the humanitarian says that the former Two and a Half Men star is welcome to join him in his efforts in the nation of Haiti, which is still reeling from a devastating January 2010 earthquake.
"I think his energies, intelligence and passion could be both of service and servicing to him, as it is to all who are touched by the struggle of the Haitian people," Penn tells Us. "Charlie is one of the very few public people who cannot be accused of using the media to his own benefit."
And the Academy Award winner, 50, is even willing to show Sheen the ropes.
"I would very much like to show my old friend the world of needs on the ground in Haiti, and introduce him and his tremendous wit to our hard working Haitian staff," said Penn. "If he chooses to give support, I'll trust it."
Earlier this week, Sheen told Access Hollywood, "We're going to do a couple things first and then it looks like we're heading down [to Haiti]. I'm excited as hell because, you know, if I can bring the attention of the world down there, then clearly this tsunami keeps cresting!"