ACTOR
Liam O'Brien
Known for Regular Show · Star Wars: The Bad Batch · Phineas and Ferb
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]
Snapshot 2026-10-16
- Born
- May 28, 1976
- Birthplace
- Belleville, New Jersey, USA
- Known For
- Acting
Biography
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]
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Known For
TV
Regular ShowTango (voice) · 2010
★ 8.6
★ 8.6
TV
Star Wars: The Bad BatchBolo / Captured Falleen / Raney (voice) · 2021
★ 8.1
★ 8.1
TV
Phineas and FerbRed Skull (voice) · 2007
★ 7.9
★ 7.9
TV
Star Wars RebelsCommander (voice) · 2014
★ 7.7
★ 7.7
TV
The Legend of Vox MachinaVax'ildan (voice) · 2022
★ 8.2
★ 8.2
TV
Marvel's AvengersRed Skull / Commuter (voice) · 2013
★ 7.5
★ 7.5
TV
Sofia the FirstBoswell (voice) · 2013
★ 7.2
★ 7.2
MOVIE
Phineas and Ferb: Mission MarvelRed Skull (voice) · 2013
★ 6.6
★ 6.6
Filmography
Movies
Adventures in Voice ActingSelf
2008
Afro Samurai: ResurrectionShichogoro (voice)
2009
Planet HulkHiroim (voice)
2010
Wolverine and the X-Men: Fate of the FutureKurt Wagner / Nightcrawler (voice) (archive footage)
2010
Iron Man & Hulk: Heroes UnitedThe Red Skull (voice)
2013
Phineas and Ferb: Mission MarvelRed Skull (voice)
2013
Iron Man & Captain America: Heroes UnitedThe Red Skull (voice)
2014
JLA Adventures: Trapped in TimeAquaman / Batwing Computer (voice)
2014
Star Wars Rebels: Spark of RebellionYogar Lyste/ Morad Sumar/ Vendor 1
2014
EverstarPaxley (voice)
2015
The Phoenix IncidentJacob Reynolds
2015G&
Ginger & SnapperSnapper (voice)
2016
Hulk: Where Monsters DwellDoctor Strange (voice)
2016
LEGO Marvel Super Heroes: Black Panther - Trouble in WakandaDoctor Strange (voice)
2018
Carmen Sandiego: To Steal or Not to StealProfessor Maelstrom / Diplomat / Guard 2 (voice)
2020
Adventure Never Ends: A Tabletop SagaSelf
2023
LEGO Marvel Avengers: Code RedRed Skull / Hydra Goon 2 (voice)
2023
Critical Role Live: Jester and Fjord's WeddingCaleb Widogast
2025
Critical Role Live: Oaths & AshOrym, of the Air Ashari
2025
Critical Role Live: Tag Team at the Teeth – Beyond the ShroudOrym, of the Air Ashari
2025
Critical Role Live: Tag Team at the Teeth – The Misty AscentCaleb Widogast
2025Television
Descendants of Darkness(voice) · 13 eps
2000
Phineas and FerbRed Skull (voice) · 1 eps
2007
Wolverine and the X-MenKurt Wagner (voice) · 26 eps
2009
G.I. Joe: RenegadesCaptain Anatoly Krimov/Red Star/German CEO (voice) · 1 eps
2010
Regular ShowTango (voice) · 1 eps
2010
Game On!Self - Guest · 1 eps
2012
Marvel's AvengersRed Skull / Commuter (voice) · 1 eps
2013Marvel's AvengersDoctor Strange (voice) · 1 eps
2013Marvel's AvengersRed Skull (voice) · 1 eps
2013
Sofia the FirstBoswell (voice) · 1 eps
2013
Star Wars RebelsCommander (voice) · 1 eps
2014Star Wars RebelsLt. Lyste / Stormtrooper Squad Leader (voice) · 1 eps
2014Star Wars RebelsLt. Lyste / Morad Sumar (voice) · 1 eps
2014Star Wars RebelsDeck Officer / Imperial Tech / Lieutenant Lyste (voice) · 1 eps
2014
CelebriD&DVax'ildan · 1 eps
2015
Critical RoleVax'ildan Vessar · 115 eps
2015Critical RoleOrym, of the Air Ashari · 121 eps
2015Critical RoleCaleb Widogast · 141 eps
2015Critical RoleHalandil "Hal" Fang · 41 eps
2015Critical RoleCreator
2015
Sagas of SundryEmmett Markham · 8 eps
2017
All Work No PlaySelf · 27 eps
2018All Work No PlayCreator
2018
Between the SheetsSelf · 1 eps
2018BT
Between the Sheets - Critical RoleSelf · 7 eps
2018
Um, Actually...Self - Contestant · 1 eps
2018
Carmen SandiegoProfessor Maelstrom / Vlad / Boris / Others (voice) · 31 eps
2019
Crit Recap AnimatedOrym, of the Air Ashari (voice) · 1 eps
2020Crit Recap AnimatedCaleb Widowgast (voice) · 10 eps
2020
Narrative TelephoneSelf · 24 eps
2020Narrative TelephoneSelf - Storyteller · 2 eps
2020
DOTA: Dragon's BloodNikdo / Bandit #1 / Bandit #4 (voice) · 1 eps
2021
Exandria UnlimitedOrym, of the Air Ashari · 8 eps
2021Exandria UnlimitedErro Mordaurum · 4 eps
2021
Star Wars: The Bad BatchBolo / Captured Falleen / Raney (voice) · 1 eps
2021Star Wars: The Bad BatchBolo / Tactical Droid (voice) · 1 eps
2021Star Wars: The Bad BatchBolo / Scrapper (voice) · 1 eps
2021Star Wars: The Bad BatchBolo (voice) · 2 eps
2021Star Wars: The Bad BatchBolo / Pyke (voice) · 1 eps
2021Star Wars: The Bad BatchBartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice) · 1 eps
2021Star Wars: The Bad BatchDevaronian Captain / Pyke (voice) · 1 eps
2021
4-Sided DiveSelf · 14 eps
2022
Dirty LaundrySelf - Guest · 1 eps
2022
The Legend of Vox MachinaVax'ildan (voice) · 48 eps
2022The Legend of Vox MachinaExecutive Producer
2022The Legend of Vox MachinaWriter
2022
Candela ObscuraCosmo Grimm · 3 eps
2023Candela ObscuraGame Master · 3 eps
2023
Star Wars: Young Jedi AdventuresMaster Estala Maru (voice) · 2 eps
2023Star Wars: Young Jedi AdventuresOnderrs (voice) · 1 eps
2023
Critical Role AbridgedOrym, of the Air Ashari · 123 eps
2024
Critical Role CooldownSelf · 79 eps
2024Critical Role CooldownCreator
2024
DaggerheartXarlo Grandall · 9 eps
2024
Fireside ChatSelf · 3 eps
2024
MOONWARDWalden Orlock · 4 eps
2024
Age of UmbraSkreev · 8 eps
2025
LEGO Marvel Avengers: Strange TailsDoctor Strange / Red Skull (voice) · 1 eps
2025
The Mighty NeinCaleb (voice) · 8 eps
2025The Mighty NeinExecutive Producer
2025
Weird KidsMcTuff (voice) · 4 eps
2025
Tale GateSelf · 2 eps
2026TD
The Dragon King1 eps
Photos
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