James C. Mathis III is an American actor and voice actor.
He is best known for providing the voice of Black Panther/T'Challa in The Avengers: Earth's Mightiest Heroes, Avengers Assemble, and Lego Marvel Super Heroes-Black Panther: Trouble in Wakanda, as well as voicing the character in video games. In addition, he provided the voices of Bulldozer and King Cobra for the first, and Heimdall for the second.
Likewise, starting in Iron Man: Rise of Technoverse, he provided the voice of War Machine/Rhodey Rhodes. And, starting in HULK and the Agents of S.M.A.S.H., he provided the voice of Ronan the Accuser.
For WordGirl, he guest starred as a pop singer named Tiny Big in the episode of the same name.