Actor profile

Liam O'Brien

28th May 1976 Belleville, New Jersey, USA Acting

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]

20 Movies 56 TV Shows 78 Credits

Filmography

Movies & TV Shows

Critical Role Live: Jester and Fjord's Wedding poster

Critical Role Live: Jester and Fjord's Wedding 15th October 2025 as Caleb Widogast

Critical Role Live: Oaths & Ash poster

Critical Role Live: Oaths & Ash 5th August 2025 as Orym, of the Air Ashari

Critical Role Live: Tag Team at the Teeth – Beyond the Shroud poster

Critical Role Live: Tag Team at the Teeth – Beyond the Shroud 25th June 2025 as Orym, of the Air Ashari

Critical Role Live: Tag Team at the Teeth – The Misty Ascent poster

Critical Role Live: Tag Team at the Teeth – The Misty Ascent 19th June 2025 as Caleb Widogast

LEGO Marvel Avengers: Code Red poster

LEGO Marvel Avengers: Code Red 26th October 2023 as Red Skull / Hydra Goon 2 (voice)

Adventure Never Ends: A Tabletop Saga poster

Adventure Never Ends: A Tabletop Saga 11th April 2023 as Self

Carmen Sandiego: To Steal or Not to Steal poster

Carmen Sandiego: To Steal or Not to Steal 10th March 2020 as Professor Maelstrom / Diplomat / Guard 2 (voice)

LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda poster

LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda 4th June 2018 as Doctor Strange (voice)

Hulk: Where Monsters Dwell poster

Hulk: Where Monsters Dwell 21st October 2016 as Doctor Strange (voice)

Everstar poster

Everstar 5th November 2015 as Paxley (voice)

The Phoenix Incident poster

The Phoenix Incident 16th June 2015 as Jacob Reynolds

Star Wars Rebels: Spark of Rebellion poster

Star Wars Rebels: Spark of Rebellion 3rd October 2014 as Yogar Lyste/ Morad Sumar/ Vendor 1

Iron Man & Captain America: Heroes United poster

Iron Man & Captain America: Heroes United 29th July 2014 as The Red Skull (voice)

JLA Adventures: Trapped in Time poster

JLA Adventures: Trapped in Time 21st January 2014 as Aquaman / Batwing Computer (voice)

Iron Man & Hulk: Heroes United poster

Iron Man & Hulk: Heroes United 3rd December 2013 as The Red Skull (voice)

Phineas and Ferb: Mission Marvel poster

Phineas and Ferb: Mission Marvel 16th August 2013 as Red Skull (voice)

Planet Hulk poster

Planet Hulk 2nd February 2010 as Hiroim (voice)

Wolverine and the X-Men: Fate of the Future poster

Wolverine and the X-Men: Fate of the Future 1st February 2010 as Kurt Wagner / Nightcrawler (voice) (archive footage)

Afro Samurai: Resurrection poster

Afro Samurai: Resurrection 24th April 2009 as Shichogoro (voice)

Adventures in Voice Acting poster

Adventures in Voice Acting 3rd July 2008 as Self

Tale Gate poster

Tale Gate 20th January 2026 as Self

The Mighty Nein poster

The Mighty Nein 19th November 2025 as Caleb (voice)

LEGO Marvel Avengers: Strange Tails poster

LEGO Marvel Avengers: Strange Tails 14th November 2025 as Doctor Strange / Red Skull (voice)

Age of Umbra poster

Age of Umbra 29th May 2025 as Skreev

Weird Kids poster

Weird Kids 25th March 2025 as McTuff (voice)

Daggerheart poster

Daggerheart 3rd December 2024 as Xarlo Grandall

MOONWARD poster

MOONWARD 7th August 2024 as Walden Orlock

Fireside Chat poster

Fireside Chat 21st May 2024 as Self

Critical Role Abridged poster

Critical Role Abridged 9th May 2024 as Orym, of the Air Ashari

Critical Role Cooldown poster

Critical Role Cooldown 9th May 2024 as Self

Candela Obscura poster

Candela Obscura 25th May 2023 as Cosmo Grimm

Candela Obscura poster

Candela Obscura 25th May 2023 as Game Master

Star Wars: Young Jedi Adventures poster

Star Wars: Young Jedi Adventures 4th May 2023 as Master Estala Maru (voice)

Star Wars: Young Jedi Adventures poster

Star Wars: Young Jedi Adventures 4th May 2023 as Onderrs (voice)

Dirty Laundry poster

Dirty Laundry 11th April 2022 as Self - Guest

4-Sided Dive poster

4-Sided Dive 5th April 2022 as Self

The Legend of Vox Machina poster

The Legend of Vox Machina 27th January 2022 as Vax'ildan (voice)

Exandria Unlimited poster

Exandria Unlimited 24th June 2021 as Orym, of the Air Ashari

Exandria Unlimited poster

Exandria Unlimited 24th June 2021 as Erro Mordaurum

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Bolo / Captured Falleen / Raney (voice)

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Bolo / Tactical Droid (voice)

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Bolo / Scrapper (voice)

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Bolo (voice)

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Bolo / Pyke (voice)

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Bartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice)

Star Wars: The Bad Batch poster

Star Wars: The Bad Batch 4th May 2021 as Devaronian Captain / Pyke (voice)

DOTA: Dragon's Blood poster

DOTA: Dragon's Blood 25th March 2021 as Nikdo / Bandit #1 / Bandit #4 (voice)

Crit Recap Animated poster

Crit Recap Animated 23rd December 2020 as Caleb Widowgast (voice)

Crit Recap Animated poster

Crit Recap Animated 23rd December 2020 as Orym, of the Air Ashari (voice)

Narrative Telephone poster

Narrative Telephone 6th April 2020 as Self

Narrative Telephone poster

Narrative Telephone 6th April 2020 as Self - Storyteller

Carmen Sandiego poster

Carmen Sandiego 18th January 2019 as Professor Maelstrom / Vlad / Boris / Others (voice)

Um, Actually... poster

Um, Actually... 28th September 2018 as Self - Contestant

Between the Sheets poster

Between the Sheets 17th September 2018 as Self

Critical Role: The Mighty Nein poster

Critical Role: The Mighty Nein 11th January 2018 as Caleb Widogast

Sagas of Sundry poster

Sagas of Sundry 29th June 2017 as Emmett Markham

WIRED's Autocomplete Interviews poster

WIRED's Autocomplete Interviews 1st March 2016 as Self - Guest

CelebriD&D poster

CelebriD&D 19th October 2015 as Vax'ildan

Critical Role poster

Critical Role 12th March 2015 as Vax'ildan Vessar

Critical Role poster

Critical Role 12th March 2015 as Caleb Widogast

Critical Role poster

Critical Role 12th March 2015 as Orym, of the Air Ashari

Critical Role poster

Critical Role 12th March 2015 as Halandil "Hal" Fang

Star Wars Rebels poster

Star Wars Rebels 13th October 2014 as Commander (voice)

Star Wars Rebels poster

Star Wars Rebels 13th October 2014 as Lt. Lyste / Stormtrooper Squad Leader (voice)

Star Wars Rebels poster

Star Wars Rebels 13th October 2014 as Lt. Lyste / Morad Sumar (voice)

Star Wars Rebels poster

Star Wars Rebels 13th October 2014 as Deck Officer / Imperial Tech / Lieutenant Lyste (voice)

Marvel's Avengers poster

Marvel's Avengers 26th May 2013 as Red Skull / Commuter (voice)

Marvel's Avengers poster

Marvel's Avengers 26th May 2013 as Doctor Strange (voice)

Marvel's Avengers poster

Marvel's Avengers 26th May 2013 as Red Skull (voice)

Sofia the First poster

Sofia the First 11th January 2013 as Boswell (voice)

Game On! poster

Game On! 15th January 2012 as Self - Guest

G.I. Joe: Renegades poster

G.I. Joe: Renegades 26th November 2010 as Captain Anatoly Krimov/Red Star/German CEO (voice)

Regular Show poster

Regular Show 6th September 2010 as Tango (voice)

Wolverine and the X-Men poster

Wolverine and the X-Men 23rd January 2009 as Kurt Wagner (voice)

Phineas and Ferb poster

Phineas and Ferb 17th August 2007 as Red Skull (voice)

Descendants of Darkness poster

Descendants of Darkness 2nd October 2000 as (voice)