Gregory D. "Greg" Baldwin (born September 13, 1960) is an American actor and voice actor. He is known for replacing actor Mako in a number of voice roles after the latter's death in 2006.
He voiced Iroh for the final season of Avatar: The Last Airbender and later for the second and third seasons of The Legend of Korra.
He can be heard as the ancient Jedi Master Tera Sinube and as the head farmer (season 2, episode 17) on Star Wars: The Clone Wars. Baldwin provided the voice of multiple characters in Lego Star Wars: The Freemaker Adventures, most notably, the voice of Furlac. He voices Aku in the fifth season of Samurai Jack.