Sean Hennigan is an American actor with a career spanning over three decades, recognized for his extensive work in voice acting for anime and video games, as well as his performances in film, television, and theater. His voice acting is noted for its versatility and distinct range, making him a frequently sought-after talent for dubbing English versions of Japanese anime.

Hennigan's voice is prominent in several major anime series and films. He is particularly well-known within the One Piece franchise for voicing the legendary pirate king Gol D. Roger, a role he performed in the film One Piece Stampede, and for providing the voice of another key character, Benn Beckman. Another significant film role is that of M in the English dub of the 2015 anime film The Empire of Corpses.

His other notable anime credits encompass a wide variety of characters. He voiced Iozen in The Boy and the Beast, Montague in Romeo x Juliet, Tenjin in Noragami, and Yoshimura in Tokyo Ghoul. His filmography also includes roles in series such as Baccano! as Maiza Avaro, Yona of the Dawn as King Il, and the video game Smite as the character Janus. More recent work includes the character Song Chi-Yul in the English version of the Solo Leveling anime and its video game adaptation, and roles in Frieren: Beyond Journey's End and One Piece Film: Red.

Beyond voice acting, Hennigan has a substantial background in live-action performance. His film credits include roles in 3:10 to Yuma and The Life of David Gale. On television, he appeared in multiple episodes of the PBS series Wishbone and had guest roles in shows like Walker, Texas Ranger. He also has an extensive background in theater, with over 100 stage credits to his name.