Liam O'Brien

Personal Info

Birthday

May 28, 1976

(49 years old)

Place of Birth

Belleville, New Jersey, USA

Also Known As

Liam O'Brian

William Markham

Christopher Liam O'Brien

Liam Christopher O'Brien

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

Critical Role

The Legend of Vox Machina

Star Wars Rebels

Star Wars: The Bad Batch

Marvel's Avengers

Star Wars: Young Jedi Adventures

Filmography

2025
Critical Role Live: NYC Radio City Music Hall
as Caleb Widogast
Critical Role: Oaths & Ash
as Orym
Critical Role Live: Tag Team at the Teeth – Beyond the Shroud
as Orym
Critical Role Live: Tag Team at the Teeth – The Misty Ascent
as Caleb Widogast
2023
LEGO Marvel Avengers: Code Red
as Red Skull / Hydra Goon 2 (voice)
Adventure Never Ends: A Tabletop Saga
as Self
2020
Carmen Sandiego: To Steal or Not to Steal
as Professor Maelstrom / Diplomat / Guard 2 (voice)
2018
LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda
as Doctor Strange (voice)
2016
Ginger & Snapper
as Snapper (voice)
Hulk: Where Monsters Dwell
as Doctor Strange (voice)
2015
Everstar
as Paxley (voice)
The Phoenix Incident
as Jacob Reynolds
2014
Star Wars Rebels: Spark of Rebellion
as Yogar Lyste/ Morad Sumar/ Vendor 1
Iron Man & Captain America: Heroes United
as The Red Skull (voice)
JLA Adventures: Trapped in Time
as Aquaman (voice)
2013
Iron Man & Hulk: Heroes United
as The Red Skull (voice)
Phineas and Ferb: Mission Marvel
as Red Skull (voice)
2010
Planet Hulk
as Hiroim (voice)
Wolverine and the X-Men: Fate of the Future
as Kurt Wagner / Nightcrawler (voice) (archive footage)
2009
Afro Samurai: Resurrection
as Shichogoro (voice)
2008
Adventures in Voice Acting
as Self
2006
Brave Story
as Ishioka Young Bishop (English version, voice)
1990
The Spirit of '76
as Rodney Snodgrass