Liam O'Brien
Known for Acting · 58 credits
- Born
- 1976-05-28 (age 50)
- Place of birth
- Belleville, New Jersey, USA
- Also known as
- Liam O'Brian · William Markham · Christopher Liam O'Brien · Liam Christopher 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
2010
as Tango (voice)
Phineas and Ferb
2007
as Red Skull (voice)
Critical Role
2015
as Vax'ildan Vessar / Orym, of the Air Ashari / Caleb Widogast / Halandil "Hal" Fang
The Legend of Vox Machina
2022
as Vax'ildan (voice)
Marvel's Avengers
2013
as Red Skull / Commuter (voice) / Doctor Strange (voice) / Red Skull (voice)
Star Wars: Young Jedi Adventures
2023
as Master Estala Maru (voice) / Onderrs (voice)
TV Shows (37)
Regular Show
2010
as Tango (voice)
Phineas and Ferb
2007
as Red Skull (voice)
Critical Role
2015
as Vax'ildan Vessar / Orym, of the Air Ashari / Caleb Widogast / Halandil "Hal" Fang
The Legend of Vox Machina
2022
as Vax'ildan (voice)
Marvel's Avengers
2013
as Red Skull / Commuter (voice) / Doctor Strange (voice) / Red Skull (voice)
Star Wars: Young Jedi Adventures
2023
as Master Estala Maru (voice) / Onderrs (voice)
Star Wars Rebels
2014
as Commander (voice) / Lt. Lyste / Stormtrooper Squad Leader (voice) / Lt. Lyste / Morad Sumar (voice) / Deck Officer / Imperial Tech / Lieutenant Lyste (voice)
Sofia the First
2013
as Boswell (voice)
Critical Role Cooldown
2024
as Self
Critical Role Abridged
2024
as Orym, of the Air Ashari
Narrative Telephone
2020
as Self / Self - Storyteller
Star Wars: The Bad Batch
2021
as Bolo / Captured Falleen / Raney (voice) / Bolo / Tactical Droid (voice) / Bolo / Scrapper (voice) / Bolo (voice) / Bolo / Pyke (voice) / Bartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice) / Devaronian Captain / Pyke (voice)
Um, Actually...
2018
as Self - Contestant
The Mighty Nein
2025
as Caleb (voice)
G.I. Joe: Renegades
2010
as Captain Anatoly Krimov/Red Star/German CEO (voice)
DOTA: Dragon's Blood
2021
as Nikdo / Bandit #1 / Bandit #4 (voice)
Carmen Sandiego
2019
as Professor Maelstrom / Vlad / Boris / Others (voice)
Dirty Laundry
2022
as Self - Guest
Critical Role: The Mighty Nein
2018
as Caleb Widogast
Fireside Chat
2024
as Self
Descendants of Darkness
2000
as (voice)
Wolverine and the X-Men
2009
as Kurt Wagner (voice)
LEGO Marvel Avengers: Strange Tails
2025
as Doctor Strange / Red Skull (voice)
Daggerheart
2024
as Xarlo Grandall
Candela Obscura
2023
as Cosmo Grimm / Game Master
Age of Umbra
2025
as Skreev
Tale Gate
2026
as Self
Exandria Unlimited
2021
as Orym, of the Air Ashari / Erro Mordaurum
Sagas of Sundry
2017
as Emmett Markham
4-Sided Dive
2022
as Self
CelebriD&D
2015
as Vax'ildan
Crit Recap Animated
2020
as Orym, of the Air Ashari (voice) / Caleb Widowgast (voice)
Weird Kids
2025
as McTuff (voice)
Game On!
2012
as Self - Guest
Between the Sheets
2018
as Self
MOONWARD
2024
as Walden Orlock
The Dragon King
Movies (21)
Critical Role Live: Oaths & Ash
2025
as Orym, of the Air Ashari
Carmen Sandiego: To Steal or Not to Steal
2020
as Professor Maelstrom / Diplomat / Guard 2 (voice)
Planet Hulk
2010
as Hiroim (voice)
Iron Man & Hulk: Heroes United
2013
as The Red Skull (voice)
Iron Man & Captain America: Heroes United
2014
as The Red Skull (voice)
Afro Samurai: Resurrection
2009
as Shichogoro (voice)
Hulk: Where Monsters Dwell
2016
as Doctor Strange (voice)
Ginger & Snapper
2016
as Snapper (voice)
Phineas and Ferb: Mission Marvel
2013
as Red Skull (voice)
JLA Adventures: Trapped in Time
2014
as Aquaman / Batwing Computer (voice)
LEGO Marvel Avengers: Code Red
2023
as Red Skull / Hydra Goon 2 (voice)
Critical Role Live: Jester and Fjord's Wedding
2025
as Caleb Widogast
Critical Role Live: Tag Team at the Teeth – Beyond the Shroud
2025
as Orym, of the Air Ashari
Critical Role Live: Tag Team at the Teeth – The Misty Ascent
2025
as Caleb Widogast
Adventures in Voice Acting
2008
as Self
The Phoenix Incident
2015
as Jacob Reynolds
LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda
2018
as Doctor Strange (voice)
Star Wars Rebels: Spark of Rebellion
2014
as Yogar Lyste/ Morad Sumar/ Vendor 1
Everstar
2015
as Paxley (voice)
Wolverine and the X-Men: Fate of the Future
2010
as Kurt Wagner / Nightcrawler (voice) (archive footage)
Adventure Never Ends: A Tabletop Saga
2023
as Self
About Liam O'Brien
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] With 58 credits spanning from 2000 to 2026, Liam O'Brien has appeared in 21 films and 37 TV shows.
Fans searching for Liam O'Brien movies, Liam O'Brien filmography, or the latest projects starring Liam O'Brien can stream many of these titles on Bowood.TV, free and in HD, with no subscription required.
Most Popular Liam O'Brien Movies
- Critical Role Live: Oaths & Ash (2025) — as Orym, of the Air Ashari
- Carmen Sandiego: To Steal or Not to Steal (2020) — as Professor Maelstrom / Diplomat / Guard 2 (voice)
- Planet Hulk (2010) — as Hiroim (voice)
- Iron Man & Hulk: Heroes United (2013) — as The Red Skull (voice)
- Iron Man & Captain America: Heroes United (2014) — as The Red Skull (voice)
Where to Watch Liam O'Brien Films
Most Liam O'Brien movies and series are available to stream on Bowood.TV in full HD, completely free and without signup. Browse the complete filmography above to jump directly to any title. For more films and the latest web series featuring Liam O'Brien, check our movies catalogue and browse page.