Liam O'Brien

Acting

Liam O'Brien

Born 28 May 1976 · Belleville, New Jersey, USA · 50

Liam is an American voice actor, writer and voice director in the Los Angeles area. He has been involved in many English-language adaptations of Japanese anime, and is also a regular in numerous video games and cartoons. [wikipedia]

Known for

Highlights

Regular Show2010 · Series · Tango (voice)
Star Wars: The Bad Batch2021 · Series · Bolo / Captured Falleen / Raney (voice)
Phineas and Ferb2007 · Series · Red Skull (voice)
The Legend of Vox Machina2022 · Series · Vax'ildan (voice)
Star Wars Rebels2014 · Series · Commander (voice)
Marvel's Avengers2013 · Series · Red Skull / Commuter (voice)

Filmography

Movies

17 films

Critical Role Live: Jester and Fjord's Wedding2025 · Film · Caleb Widogast
Critical Role Live: Oaths & Ash2025 · Film · Orym, of the Air Ashari
Critical Role Live: Tag Team at the Teeth – Beyond the Shroud2025 · Film · Orym, of the Air Ashari
Critical Role Live: Tag Team at the Teeth – The Misty Ascent2025 · Film · Caleb Widogast
LEGO Marvel Avengers: Code Red2023 · Film · Red Skull / Hydra Goon 2 (voice)
Carmen Sandiego: To Steal or Not to Steal2020 · Film · Professor Maelstrom / Diplomat / Guard 2 (voice)
LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda2018 · Film · Doctor Strange (voice)
Hulk: Where Monsters Dwell2016 · Film · Doctor Strange (voice)
Everstar2015 · Film · Paxley (voice)
The Phoenix Incident2015 · Film · Jacob Reynolds
Star Wars Rebels: Spark of Rebellion2014 · Film · Yogar Lyste/ Morad Sumar/ Vendor 1
Iron Man & Captain America: Heroes United2014 · Film · The Red Skull (voice)
JLA Adventures: Trapped in Time2014 · Film · Aquaman / Batwing Computer (voice)
Iron Man & Hulk: Heroes United2013 · Film · The Red Skull (voice)
Phineas and Ferb: Mission Marvel2013 · Film · Red Skull (voice)
Planet Hulk2010 · Film · Hiroim (voice)
Afro Samurai: Resurrection2009 · Film · Shichogoro (voice)

Filmography

Series

26 shows

The Mighty Nein2025 · Series · Caleb (voice)
LEGO Marvel Avengers: Strange Tails2025 · Series · Doctor Strange / Red Skull (voice)
Age of Umbra2025 · Series · Skreev
Daggerheart2024 · Series · Xarlo Grandall
MOONWARD2024 · Series · Walden Orlock
Critical Role Abridged2024 · Series · Orym, of the Air Ashari
Candela Obscura2023 · Series · Cosmo Grimm
Star Wars: Young Jedi Adventures2023 · Series · Master Estala Maru (voice)
The Legend of Vox Machina2022 · Series · Vax'ildan (voice)
Exandria Unlimited2021 · Series · Orym, of the Air Ashari
Star Wars: The Bad Batch2021 · Series · Bolo / Captured Falleen / Raney (voice)
DOTA: Dragon's Blood2021 · Series · Nikdo / Bandit #1 / Bandit #4 (voice)
Crit Recap Animated2020 · Series · Orym, of the Air Ashari (voice)
Carmen Sandiego2019 · Series · Professor Maelstrom / Vlad / Boris / Others (voice)
All Work No Play2018 · Series · Creator
Sagas of Sundry2017 · Series · Emmett Markham
CelebriD&D2015 · Series · Vax'ildan
Critical Role2015 · Series · Vax'ildan Vessar
Star Wars Rebels2014 · Series · Commander (voice)
Marvel's Avengers2013 · Series · Red Skull / Commuter (voice)
Sofia the First2013 · Series · Boswell (voice)
G.I. Joe: Renegades2010 · Series · Captain Anatoly Krimov/Red Star/German CEO (voice)
Regular Show2010 · Series · Tango (voice)
Wolverine and the X-Men2009 · Series · Kurt Wagner (voice)
Phineas and Ferb2007 · Series · Red Skull (voice)
Descendants of Darkness2000 · Series · (voice)