Matthew Mercer is an American voice actor and dungeon master, best known for his work in the world of tabletop role-playing games. He gained widespread recognition for his role as the dungeon master on the popular web series Critical Role, where he leads a group of players through intricate stories and adventures in the Dungeons & Dragons universe. In addition to his work on Critical Role, Mercer has voiced numerous characters in video games, animated series, and films. Some of his notable roles include Levi Ackerman in Attack on Titan and Jotaro Kujo in JoJo's Bizarre Adventure. His contributions to the voice acting industry have made him a prominent figure among fans of animation and gaming.