Polyphemus
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Personal Info

Gender

Male

Birthday

1976-05-28 (48 years old)

Place of Birth

Belleville, New Jersey, USA

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

Acting

2025

Weird Kids as Self

2024

Moonward as Walden Orlock
Moonward as Self (voice)

2023

LEGO Marvel Avengers: Code Red as Red Skull / Hydra Goon 2 (voice)
Star Wars: Young Jedi Adventures as Master Estala Maru (voice)
Candela Obscura as Cosmo Grimm
Candela Obscura as Game Master

2022

The Legend of Vox Machina as Vax'ildan (voice)
Dirty Laundry as Self - Guest
4-Sided Dive as Self

2021

DOTA: Dragon's Blood as Nikdo / Bandit #1 / Bandit #4 (voice)
Star Wars: The Bad Batch as Bolo / Tactical Droid (voice)
Star Wars: The Bad Batch as Bolo / Captured Falleen / Raney (voice)
Star Wars: The Bad Batch as Bolo / Scrapper (voice)
Star Wars: The Bad Batch as Bolo (voice)
Star Wars: The Bad Batch as Bolo / Pyke (voice)
Star Wars: The Bad Batch as Bartender Droid / Stormtrooper #1 / Stormtrooper #3 (voice)
Star Wars: The Bad Batch as Devaronian Captain / Pyke (voice)
Exandria Unlimited as Erro Mordaurum

2020

Carmen Sandiego: To Steal or Not to Steal as Professor Maelstrom / Diplomat / Guard 2 (voice)
Crit Recap Animated as Caleb Widowgast (voice)
Crit Recap Animated as Orym (voice)
MIDST as Self

2018

Um, Actually... as Self - Contestant

2017

Sagas of Sundry as Emmett Markham

2016

Ginger & Snapper as Snapper (voice)
Hulk: Where Monsters Dwell as Doctor Strange (voice)

2015

The Phoenix Incident as Jacob Reynolds
Everstar as Paxley (voice)
CelebriD&D as Vax'ildan
Critical Role as Vax'ildan Vessar
Critical Role as Caleb Widogast
Critical Role as Self / Vax'ildan Vessar
Critical Role as Reverend Forrest Alton
Critical Role as Dungeon Master
Critical Role as Jayne Merriweather
Critical Role as Liam O'Brien
Critical Role as Cookie
Critical Role as Quazirat Tolluz
Critical Role as Ringo
Critical Role as Lieve'tel Toluse
Critical Role as Tomeytine
Critical Role as Septimus Goodfellow
Critical Role as Derrig / Vax'ildan Vessar
Critical Role as Buddy
Critical Role as Forrest Coreman
Critical Role as Lucas Dankworth (NerfWormGrim01011)
Critical Role as Garrett O'Neil
Critical Role as Trystan Beasley
Critical Role as Xarlo Grandall
Critical Role as Game Master
Critical Role as Mordred the Gaunt
Critical Role as Narrator (voice)
Critical Role as Player

2014

Star Wars Rebels: Spark of Rebellion as Yogar Lyste/ Morad Sumar/ Vendor 1
Star Wars Rebels as Commander (voice)
Star Wars Rebels as Lt. Lyste / Stormtrooper Squad Leader (voice)
Star Wars Rebels as Lt. Lyste / Morad Sumar (voice)
Star Wars Rebels as Deck Officer / Imperial Tech / Lieutenant Lyste (voice)

2013

Iron Man & Hulk: Heroes United as The Red Skull (voice)
Marvel's Avengers as Doctor Strange (voice)
Marvel's Avengers as Red Skull / Commuter (voice)

2010

Wolverine and the X-Men: Fate of the Future as Kurt Wagner / Nightcrawler (voice) (archive footage)
Planet Hulk as Hiroim (voice)
Regular Show as Tango (voice)

2009

Afro Samurai: Resurrection as Shichogoro (voice)
Wolverine and the X-Men as Kurt Wagner (voice)

2008

2007

Phineas and Ferb as Red Skull (voice)

2006

Brave Story as Ishioka Young Bishop (English version, voice)

2000

1990

The Spirit of '76 as Rodney Snodgrass

Production

2022

The Legend of Vox Machina as Executive Producer

Writing

Creator

2024

2015

Critical Role as Creator