Sources have said that the former couple are enjoying a "lovely get-together" as they work together on projects, the Daily Express reported.
The 53-year-old actor, who has served as an ambassador for Haiti after founding his humanitarian group, had earlier revealed that he invited his former wife and that they have maintained a great friendship over the years.
Penn had said that the 55-year-old singer is in Haiti, seeing things and he is thrilled by the fact that she has made the effort to come.
He added that the '4 Minutes' hitmaker has a unique platform, and it's good how she chooses to bring that to everywhere.
The couple was married in 1985, before splitting in 1989.
--ANI (Posted on 04-12-2013)