Liam O'Brien

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

Regular Show

Phineas and Ferb

The Legend of Vox Machina

Critical Role

Star Wars Rebels

All Movies (21)

Critical Role Live: Jester and Fjord's Wedding2025 · as Caleb Widogast
Critical Role Live: Oaths & Ash2025 · as Orym, of the Air Ashari
Critical Role Live: Tag Team at the Teeth – Beyond the Shroud2025 · as Orym, of the Air Ashari
Critical Role Live: Tag Team at the Teeth – The Misty Ascent2025 · as Caleb Widogast
LEGO Marvel Avengers: Code Red2023 · as Red Skull / Hydra Goon 2 (voice)
Adventure Never Ends: A Tabletop Saga2023 · as Self
Carmen Sandiego: To Steal or Not to Steal2020 · as Professor Maelstrom / Diplomat / Guard 2 (voice)
LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda2018 · as Doctor Strange (voice)
Ginger & Snapper2016 · as Snapper (voice)
Hulk: Where Monsters Dwell2016 · as Doctor Strange (voice)
Everstar2015 · as Paxley (voice)
The Phoenix Incident2015 · as Jacob Reynolds
Star Wars Rebels: Spark of Rebellion2014 · as Yogar Lyste/ Morad Sumar/ Vendor 1
Iron Man & Captain America: Heroes United2014 · as The Red Skull (voice)
JLA Adventures: Trapped in Time2014 · as Aquaman / Batwing Computer (voice)
Iron Man & Hulk: Heroes United2013 · as The Red Skull (voice)
Phineas and Ferb: Mission Marvel2013 · as Red Skull (voice)
Planet Hulk2010 · as Hiroim (voice)
Wolverine and the X-Men: Fate of the Future2010 · as Kurt Wagner / Nightcrawler (voice) (archive footage)
Afro Samurai: Resurrection2009 · as Shichogoro (voice)
Adventures in Voice Acting2008 · as Self

All TV Shows (55)

Tale Gate2026 · as Self
The Mighty Nein2025 · as Caleb (voice)
LEGO Marvel Avengers: Strange Tails2025 · as Doctor Strange / Red Skull (voice)
Age of Umbra2025 · as Skreev
Weird Kids2025 · as McTuff (voice)
Daggerheart2024 · as Xarlo Grandall
MOONWARD2024 · as Walden Orlock
Fireside Chat2024 · as Self
Critical Role Abridged2024 · as Orym, of the Air Ashari
Critical Role Cooldown2024 · as Self
Candela Obscura2023 · as Cosmo Grimm
Candela Obscura2023 · as Game Master
Star Wars: Young Jedi Adventures2023 · as Master Estala Maru (voice)
Star Wars: Young Jedi Adventures2023 · as Onderrs (voice)
Dirty Laundry2022 · as Self - Guest
4-Sided Dive2022 · as Self
The Legend of Vox Machina2022 · as Vax'ildan (voice)
Exandria Unlimited2021 · as Orym, of the Air Ashari
Exandria Unlimited2021 · as Erro Mordaurum
Star Wars: The Bad Batch2021 · as Bolo / Captured Falleen / Raney (voice)
Star Wars: The Bad Batch2021 · as Bolo / Tactical Droid (voice)
Star Wars: The Bad Batch2021 · as Bolo / Scrapper (voice)
Star Wars: The Bad Batch2021 · as Bolo (voice)
Star Wars: The Bad Batch2021 · as Bolo / Pyke (voice)
Star Wars: The Bad Batch2021 · as Bartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice)
Star Wars: The Bad Batch2021 · as Devaronian Captain / Pyke (voice)
DOTA: Dragon's Blood2021 · as Nikdo / Bandit #1 / Bandit #4 (voice)
Crit Recap Animated2020 · as Caleb Widowgast (voice)
Crit Recap Animated2020 · as Orym, of the Air Ashari (voice)
Narrative Telephone2020 · as Self
Narrative Telephone2020 · as Self - Storyteller
Um, Actually...2018 · as Self - Contestant
Between the Sheets2018 · as Self
Critical Role: The Mighty Nein2018 · as Caleb Widogast
Sagas of Sundry2017 · as Emmett Markham
CelebriD&D2015 · as Vax'ildan
Critical Role2015 · as Vax'ildan Vessar
Critical Role2015 · as Caleb Widogast
Critical Role2015 · as Orym, of the Air Ashari
Critical Role2015 · as Halandil "Hal" Fang
Star Wars Rebels2014 · as Commander (voice)
Star Wars Rebels2014 · as Lt. Lyste / Stormtrooper Squad Leader (voice)
Star Wars Rebels2014 · as Lt. Lyste / Morad Sumar (voice)
Star Wars Rebels2014 · as Deck Officer / Imperial Tech / Lieutenant Lyste (voice)
Marvel's Avengers2013 · as Red Skull / Commuter (voice)
Marvel's Avengers2013 · as Doctor Strange (voice)
Marvel's Avengers2013 · as Red Skull (voice)
Sofia the First2013 · as Boswell (voice)
Game On!2012 · as Self - Guest
G.I. Joe: Renegades2010 · as Captain Anatoly Krimov/Red Star/German CEO (voice)
Regular Show2010 · as Tango (voice)
Wolverine and the X-Men2009 · as Kurt Wagner (voice)
Phineas and Ferb2007 · as Red Skull (voice)
Descendants of Darkness2000 · as (voice)
The Dragon King—