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]

Career Overview

Liam O'Brien has 39 screen credits in a career dating back to 2007. Their work spans 4 cinematic universes — most prominently Heroes United Collection with 2 titles. Signature works include The Legend of Vox Machina, The Mighty Nein, Hulk: Where Monsters Dwell. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.

Personal Facts

Known For: Acting
Gender: male
Known Credits: 39
Birth Date: 1976-05-28 00:00:00
Birth Place: Belleville, New Jersey, USA

Known For

Associated Universes

Universe traveler — spans 4 universes

Heroes United Collection (2 titles)
LEGO Marvel Super Heroes Collection (1 titles)
Star Wars (1 titles)
Afro Samurai Collection (1 titles)

Frequent Collaborators

Sam Riegel (9 collaborations)
Laura Bailey (7 collaborations)
Marisha Ray (6 collaborations)
Taliesin Jaffe (6 collaborations)
Travis Willingham (6 collaborations)
Ashley Johnson (5 collaborations)
Matthew Mercer (5 collaborations)
D. C. Douglas (5 collaborations)
Stan Lee (4 collaborations)
Chris Prynoski (3 collaborations)

Credits

production (2 credits)
- The Mighty Nein
  
  executive producer
  
  production
  
  - The Zadash Job (2025) ... executive producer production
  
  - Belonging (2025) ... executive producer production
  
  - Many Gifts (2025) ... executive producer production
  
  - Little Spark (2025) ... executive producer production
  
  - The Mighty Nein (2025) ... executive producer production
  
  2025
- The Legend of Vox Machina
  
  executive producer
  
  production
  
  - The Ascension (2026) ... executive producer production
  
  - Let the End Begin (2026) ... executive producer production
  
  - The Poisoned Ear (2026) ... executive producer production
  
  - The Temple of Truth (2026) ... executive producer production
  
  - The Bard's Lament (2026) ... executive producer production
  
  2022
actors (34 credits)
- The Mighty Nein
  Caleb (voice)
  
  actor
  
  actors
  
  - The Zadash Job (2025) ... Caleb (voice) actor actors
  
  - Belonging (2025) ... Caleb (voice) actor actors
  
  - Many Gifts (2025) ... Caleb (voice) actor actors
  
  - Little Spark (2025) ... Caleb (voice) actor actors
  
  - The Mighty Nein (2025) ... Caleb (voice) actor actors
  
  2025
- Critical Role Live: Jester and Fjord's Wedding
  Caleb Widogast
  
  actor
  
  actors
  
  2025
- Critical Role Live: Oaths & Ash
  Orym, of the Air Ashari
  
  actor
  
  actors
  
  2025
- Critical Role Live: Tag Team at the Teeth – Beyond the Shroud
  Orym, of the Air Ashari
  
  actor
  
  actors
  
  2025
- Critical Role Live: Tag Team at the Teeth – The Misty Ascent
  Caleb Widogast
  
  actor
  
  actors
  
  2025
- LEGO Marvel Avengers: Strange Tails
  
  - Part 2 (2025) ... Doctor Strange (voice) / Red Skull (voice) actor actors
  
  2025
- LEGO Marvel Avengers: Code Red
  Red Skull / Hydra Goon 2 (voice)
  
  actor
  
  actors
  
  2023
- Adventure Never Ends: A Tabletop Saga
  Self
  
  actor
  
  actors
  
  2023
- Star Wars: Young Jedi Adventures
  
  - Mine and Ours / The Andraven Circuit (2024) ... Onderrs (voice) actor actors
  
  - The Prince and the Pirate (2024) ... Master Estala Maru (voice) actor actors
  
  - Stuck in the Muck / Junkyard Sleepover (2023) ... Master Estala Maru (voice) actor actors
  
  2023
- The Legend of Vox Machina
  Vax'ildan (voice)
  
  actor
  
  actors
  
  - The Ascension (2026) ... Vax'ildan (voice) actor actors
  
  - Let the End Begin (2026) ... Vax'ildan (voice) actor actors
  
  - The Poisoned Ear (2026) ... Vax'ildan (voice) actor actors
  
  - The Temple of Truth (2026) ... Vax'ildan (voice) actor actors
  
  - The Bard's Lament (2026) ... Vax'ildan (voice) actor actors
  
  2022
- Star Wars: The Bad Batch
  
  - A Different Approach (2024) ... Bartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice) actor actors
  
  - Paths Unknown (2024) ... Devaronian Captain / Pyke (voice) actor actors
  
  - Entombed (2023) ... Bolo (voice) actor actors
  
  - Infested (2021) ... Bolo / Pyke (voice) actor actors
  
  - Common Ground (2021) ... Bolo (voice) actor actors
  
  2021
- Carmen Sandiego: To Steal or Not to Steal
  Professor Maelstrom / Diplomat / Guard 2 (voice)
  
  actor
  
  actors
  
  2020
- LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda
  Doctor Strange (voice)
  
  actor
  
  actors
  
  2018
- Critical Role: The Mighty Nein
  Caleb Widogast
  
  actor
  
  actors
  
  - The Mighty Nein Reunion: Echoes of the Solstice (2023) ... Caleb Widogast actor actors
  
  - The Mighty Nein Reunited Part 2 - Uk'otoa Unleashed (2022) ... Caleb Widogast actor actors
  
  - The Mighty Nein Reunited Part 1 - Unfinished Business (2022) ... Caleb Widogast actor actors
  
  - Campaign 2 Wrap-Up (2021) ... Caleb Widogast actor actors
  
  - Fond Farewells (2021) ... Caleb Widogast actor actors
  
  2018
- Ginger & Snapper
  Snapper (voice)
  
  actor
  
  actors
  
  2016
- Hulk: Where Monsters Dwell
  Doctor Strange (voice)
  
  actor
  
  actors
  
  2016
- Everstar
  Paxley (voice)
  
  actor
  
  actors
  
  2015
- The Phoenix Incident
  Jacob Reynolds
  
  actor
  
  actors
  
  2015
- Critical Role
  Halandil "Hal" Fang
  
  actor
  
  actors
  
  - Episode 32 (2026) ... Halandil "Hal" Fang actor actors
  
  - Trick of the Light (2026) ... Halandil "Hal" Fang actor actors
  
  - Here in the Dark (2026) ... Halandil "Hal" Fang actor actors
  
  - Opening Night (2026) ... Halandil "Hal" Fang actor actors
  
  - Chasing Shadows (2026) ... Halandil "Hal" Fang actor actors
  
  2015
- Star Wars Rebels: Spark of Rebellion
  Yogar Lyste/ Morad Sumar/ Vendor 1
  
  actor
  
  actors
  
  2014
- Iron Man & Captain America: Heroes United
  The Red Skull (voice)
  
  actor
  
  actors
  
  2014
- JLA Adventures: Trapped in Time
  Aquaman / Batwing Computer (voice)
  
  actor
  
  actors
  
  2014
- Star Wars Rebels
  
  - Through Imperial Eyes (2017) ... Deck Officer / Imperial Tech / Lieutenant Lyste (voice) actor actors
  
  - An Inside Man (2016) ... Lt. Lyste / Morad Sumar (voice) actor actors
  
  - A Princess on Lothal (2016) ... Lt. Lyste / Stormtrooper Squad Leader (voice) actor actors
  
  - Breaking Ranks (2014) ... Commander (voice) actor actors
  
  2014
- Iron Man & Hulk: Heroes United
  The Red Skull (voice)
  
  actor
  
  actors
  
  2013
- Phineas and Ferb: Mission Marvel
  Red Skull (voice)
  
  actor
  
  actors
  
  2013
- Marvel's Avengers
  
  - The Eye of Agamotto (2) (2018) ... Doctor Strange (voice) actor actors
  
  - Ghosts of the Past (2014) ... Red Skull / Commuter (voice) actor actors
  
  - Blood Feud (2013) ... Red Skull (voice) actor actors
  
  2013
- Sofia the First
  
  - Finding Clover (2013) ... Boswell (voice) actor actors
  
  2013
- Planet Hulk
  Hiroim (voice)
  
  actor
  
  actors
  
  2010
- Wolverine and the X-Men: Fate of the Future
  Kurt Wagner / Nightcrawler (voice) (archive footage)
  
  actor
  
  actors
  
  2010
- Regular Show
  
  - Gold Watch (2014) ... Tango (voice) actor actors
  
  2010
- Afro Samurai: Resurrection
  Shichogoro (voice)
  
  actor
  
  actors
  
  2009
- Wolverine and the X-Men
  Kurt Wagner (voice)
  
  actor
  
  actors
  
  - Foresight (3) (2009) ... Kurt Wagner (voice) actor actors
  
  - Foresight (2) (2009) ... Kurt Wagner (voice) actor actors
  
  - Foresight (1) (2009) ... Kurt Wagner (voice) actor actors
  
  - Shades of Grey (2009) ... Kurt Wagner (voice) actor actors
  
  - Aces and Eights (2009) ... Kurt Wagner (voice) actor actors
  
  2009
- Adventures in Voice Acting
  Self
  
  actor
  
  actors
  
  2008
- Phineas and Ferb
  
  - Phineas and Ferb: Mission Marvel (2013) ... Red Skull (voice) actor actors
  
  2007
creators (2 credits)
- Critical Role: The Mighty Nein
  
  creator
  
  creators
  
  2018
- Critical Role
  
  creator
  
  creators
  
  2015
writing (1 credits)
- The Legend of Vox Machina
  
  - De Rolo's Eleven (2026) ... writer writing
  
  - The Coming Storm (2024) ... writer writing
  
  2022