Acting
Liam O'Brien
Born 1976-05-28
Belleville, New Jersey, USA
Department: 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]
Known For
Prominent works featuring Liam O'Brien
TV
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Regular Show
2010
TMDB4.3
TV
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Phineas and Ferb
2007
TMDB4.0
TV
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Star Wars: The Bad Batch
2021
TMDB4.0
TV
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Star Wars Rebels
2014
TMDB3.9
TV
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The Legend of Vox Machina
2022
TMDB4.1
TV
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Marvel's Avengers
2013
TMDB3.8
TV
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Sofia the First
2013
TMDB3.6
Movie
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Planet Hulk
2010
TMDB3.5
TV
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DOTA: Dragon's Blood
2021
TMDB3.9
TV
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Critical Role
2015
TMDB4.1
Filmography & Credits
Complete career catalog (82 titles)
| Poster | Title | Character / Role | Type | Year |
|---|---|---|---|---|
 | Tale Gate | Self | TV Series | 2026 |
 | The Mighty Nein | Caleb (voice) | TV Series | 2025 |
| The Mighty Nein | Executive Producer | TV Series | 2025 |
 | LEGO Marvel Avengers: Strange Tails | Doctor Strange / Red Skull (voice) | TV Series | 2025 |
 | Critical Role Live: Jester and Fjord's Wedding | Caleb Widogast | Movie | 2025 |
 | Critical Role Live: Oaths & Ash | Orym, of the Air Ashari | Movie | 2025 |
 | Critical Role Live: Tag Team at the Teeth – Beyond the Shroud | Orym, of the Air Ashari | Movie | 2025 |
 | Critical Role Live: Tag Team at the Teeth – The Misty Ascent | Caleb Widogast | Movie | 2025 |
 | Age of Umbra | Skreev | TV Series | 2025 |
 | Weird Kids | McTuff (voice) | TV Series | 2025 |
 | Daggerheart | Xarlo Grandall | TV Series | 2024 |
 | MOONWARD | Walden Orlock | TV Series | 2024 |
 | Fireside Chat | Self | TV Series | 2024 |
 | Critical Role Cooldown | Self | TV Series | 2024 |
 | Critical Role Abridged | Orym, of the Air Ashari | TV Series | 2024 |
| Critical Role Cooldown | Creator | TV Series | 2024 |
 | LEGO Marvel Avengers: Code Red | Red Skull / Hydra Goon 2 (voice) | Movie | 2023 |
 | Candela Obscura | Cosmo Grimm | TV Series | 2023 |
| Candela Obscura | Game Master | TV Series | 2023 |
 | Star Wars: Young Jedi Adventures | Master Estala Maru (voice) | TV Series | 2023 |
| Star Wars: Young Jedi Adventures | Onderrs (voice) | TV Series | 2023 |
 | Adventure Never Ends: A Tabletop Saga | Self | Movie | 2023 |
 | Dirty Laundry | Self - Guest | TV Series | 2022 |
 | 4-Sided Dive | Self | TV Series | 2022 |
 | The Legend of Vox Machina | Vax'ildan (voice) | TV Series | 2022 |
| The Legend of Vox Machina | Executive Producer | TV Series | 2022 |
| The Legend of Vox Machina | Writer | TV Series | 2022 |
 | Exandria Unlimited | Orym, of the Air Ashari | TV Series | 2021 |
| Exandria Unlimited | Erro Mordaurum | TV Series | 2021 |
 | Star Wars: The Bad Batch | Bolo / Captured Falleen / Raney (voice) | TV Series | 2021 |
| Star Wars: The Bad Batch | Bolo / Tactical Droid (voice) | TV Series | 2021 |
| Star Wars: The Bad Batch | Bolo / Scrapper (voice) | TV Series | 2021 |
| Star Wars: The Bad Batch | Bolo (voice) | TV Series | 2021 |
| Star Wars: The Bad Batch | Bolo / Pyke (voice) | TV Series | 2021 |
| Star Wars: The Bad Batch | Bartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice) | TV Series | 2021 |
| Star Wars: The Bad Batch | Devaronian Captain / Pyke (voice) | TV Series | 2021 |
 | DOTA: Dragon's Blood | Nikdo / Bandit #1 / Bandit #4 (voice) | TV Series | 2021 |
 | Crit Recap Animated | Orym, of the Air Ashari (voice) | TV Series | 2020 |
| Crit Recap Animated | Caleb Widowgast (voice) | TV Series | 2020 |
 | Narrative Telephone | Self | TV Series | 2020 |
| Narrative Telephone | Self - Storyteller | TV Series | 2020 |
 | Carmen Sandiego: To Steal or Not to Steal | Professor Maelstrom / Diplomat / Guard 2 (voice) | Movie | 2020 |
 | Carmen Sandiego | Professor Maelstrom / Vlad / Boris / Others (voice) | TV Series | 2019 |
 | Um, Actually... | Self - Contestant | TV Series | 2018 |
 | Between the Sheets | Self | TV Series | 2018 |
| Between the Sheets - Critical Role | Self | TV Series | 2018 | |
 | LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda | Doctor Strange (voice) | Movie | 2018 |
 | Sagas of Sundry | Emmett Markham | TV Series | 2017 |
| Ginger & Snapper | Snapper (voice) | Movie | 2016 | |
 | Hulk: Where Monsters Dwell | Doctor Strange (voice) | Movie | 2016 |
 | Everstar | Paxley (voice) | Movie | 2015 |
 | CelebriD&D | Vax'ildan | TV Series | 2015 |
 | The Phoenix Incident | Jacob Reynolds | Movie | 2015 |
 | Critical Role | Vax'ildan Vessar | TV Series | 2015 |
| Critical Role | Orym, of the Air Ashari | TV Series | 2015 |
| Critical Role | Caleb Widogast | TV Series | 2015 |
| Critical Role | Halandil "Hal" Fang | TV Series | 2015 |
| Critical Role | Creator | TV Series | 2015 |
 | Star Wars Rebels | Commander (voice) | TV Series | 2014 |
| Star Wars Rebels | Lt. Lyste / Stormtrooper Squad Leader (voice) | TV Series | 2014 |
| Star Wars Rebels | Lt. Lyste / Morad Sumar (voice) | TV Series | 2014 |
| Star Wars Rebels | Deck Officer / Imperial Tech / Lieutenant Lyste (voice) | TV Series | 2014 |
 | Star Wars Rebels: Spark of Rebellion | Yogar Lyste/ Morad Sumar/ Vendor 1 | Movie | 2014 |
 | Iron Man & Captain America: Heroes United | The Red Skull (voice) | Movie | 2014 |
 | JLA Adventures: Trapped in Time | Aquaman / Batwing Computer (voice) | Movie | 2014 |
 | Iron Man & Hulk: Heroes United | The Red Skull (voice) | Movie | 2013 |
 | Phineas and Ferb: Mission Marvel | Red Skull (voice) | Movie | 2013 |
 | Marvel's Avengers | Red Skull / Commuter (voice) | TV Series | 2013 |
| Marvel's Avengers | Doctor Strange (voice) | TV Series | 2013 |
| Marvel's Avengers | Red Skull (voice) | TV Series | 2013 |
 | Sofia the First | Boswell (voice) | TV Series | 2013 |
 | Game On! | Self - Guest | TV Series | 2012 |
 | G.I. Joe: Renegades | Captain Anatoly Krimov/Red Star/German CEO (voice) | TV Series | 2010 |
 | Regular Show | Tango (voice) | TV Series | 2010 |
 | Planet Hulk | Hiroim (voice) | Movie | 2010 |
 | Wolverine and the X-Men: Fate of the Future | Kurt Wagner / Nightcrawler (voice) (archive footage) | Movie | 2010 |
 | Afro Samurai: Resurrection | Shichogoro (voice) | Movie | 2009 |
 | Wolverine and the X-Men | Kurt Wagner (voice) | TV Series | 2009 |
 | Adventures in Voice Acting | Self | Movie | 2008 |
 | Phineas and Ferb | Red Skull (voice) | TV Series | 2007 |
 | Descendants of Darkness | (voice) | TV Series | 2000 |
| The Dragon King | Self / Appearance | TV Series | — |