Actor Chadwick Boseman, best known for his star turn in the blockbuster Marvel superhero film Black Panther, has died at age 43 after a four-year battle with colon cancer, according to an announcement posted on Friday on his Twitter and Facebook accounts. Boseman, a native of South Carolina, passed away at his home, with his wife and family at his side, the statement said, without specifying when he died. He resided in Los Angeles.