Madonna and Sean Penn may have gotten divorced 20 years ago, but that's not stopping the former couple from reuniting for a good cause.

Madonna and her 13-year-old son Rocco have flown to Haiti to contribute to Seans J/P Haitian Relief Organization, and the Oscar winner had nothing but nice things to say about Madge.

"She's here, she's seeing, she's made the effort to come here, and I'm thrilled by that ... She has a unique platform, and wherever she chooses to bring that to, it's very well," he said. Penn added that she has donated $250,000 to the relief effort, and that they have "maintained a great friendship over the years."

Penn founded the humanitarian group after an earthquake ravaged the region in 2010, and the organization focuses on housing and relocating the thousands of people who were displaced by the disaster.

Sean posted the shot below and wrote, "With this picture, I bust my Instagram cherry. Gonna try to share snaps of our @jphro work in #Haiti and the country and its amazing people. In this shot, I'm walking where 60,000 people lived in tents after the earthquake. We've got 58,000 back in homes... It's a start."