From 2008 to 2013, Sheen's activism included attendances at meetings of the environmentalist group Earth First! and speaking appearances at youth empowerment events called We Day on behalf of Free The Children, an international charity and educational partner. Sheen has been named an ambassador of Free The Children and has supported such initiatives as the We are Silent campaign, a 24-hour pledge of silence. Speaking about his work with Free The Children, Sheen has said, "I'm hooked! I told them whenever I could offer some insight or energy or whatever I had, I'd be delighted if they would call on me, and they have." Sheen championed Help Darfur Now, a student-run organization to help aid victims of the genocide in Darfur, the western region in Sudan. He also appeared in the 2009 anti-fur documentary "Skin Trade."