Liam O'Brien

Acting

May 28, 1976 (49 years old)

Belleville, New Jersey, USA

Popularity: 1

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]

Also Known As

Liam O'Brian • William Markham • Christopher Liam O'Brien • Liam Christopher O'Brien

Recent & Upcoming

7.9

The Mighty Nein

Executive Producer • Nov 2025

Critical Role: Oaths & Ash

Orym, of the Air Ashari • Aug 2025

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

Orym, of the Air Ashari • Jun 2025

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

Caleb Widogast • Jun 2025

Known For

8.6

Regular Show

Tango (voice)

7.9

Phineas and Ferb

Red Skull (voice)

7.7

Gem

Star Wars Rebels

Commander (voice)

7.7

Gem

Star Wars Rebels

Lt. Lyste / Stormtrooper Squad Leader (voice)

7.7

Gem

Star Wars Rebels

Lt. Lyste / Morad Sumar (voice)

7.7

Gem

Star Wars Rebels

Deck Officer / Imperial Tech / Lieutenant Lyste (voice)

The Legend of Vox Machina series poster (2022)

8.2

Gem

The Legend of Vox Machina

Vax'ildan (voice)

Star Wars: The Bad Batch series poster (2021)

8.2

Gem

Star Wars: The Bad Batch

Bolo / Captured Falleen / Raney (voice)

8.2

Gem

Star Wars: The Bad Batch

Bolo / Tactical Droid (voice)

8.2

Gem

Star Wars: The Bad Batch

Bolo / Scrapper (voice)

8.2

Gem

Star Wars: The Bad Batch

Bolo (voice)

8.2

Gem

Star Wars: The Bad Batch

Bolo / Pyke (voice)

Filmography

2020s

Critical Role: Jester and Fjord's Wedding – Live from Radio City Music Hall

Caleb Widogast

Critical Role: Oaths & Ash

Orym, of the Air Ashari

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

Orym, of the Air Ashari

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

Caleb Widogast

6.5

LEGO Marvel Avengers: Code Red

Red Skull / Hydra Goon 2 (voice)

Adventure Never Ends: A Tabletop Saga

Self

6.5

Carmen Sandiego: To Steal or Not to Steal

Professor Maelstrom / Diplomat / Guard 2 (voice)

2010s

6.0

LEGO Marvel Super Heroes: Black Panther - Trouble in Wakanda

Doctor Strange (voice)

6.6

Hulk: Where Monsters Dwell

Doctor Strange (voice)

5.1

The Phoenix Incident

Jacob Reynolds

3.0

Everstar

Paxley (voice)

6.6

JLA Adventures: Trapped in Time

Aquaman / Batwing Computer (voice)

6.5

Iron Man & Captain America: Heroes United

The Red Skull (voice)

7.3

Star Wars Rebels: Spark of Rebellion

Yogar Lyste/ Morad Sumar/ Vendor 1

6.6

Phineas and Ferb: Mission Marvel

Red Skull (voice)

5.9

Iron Man & Hulk: Heroes United

The Red Skull (voice)

7.1

Planet Hulk

Hiroim (voice)

6.7

Wolverine and the X-Men: Fate of the Future

Kurt Wagner / Nightcrawler (voice) (archive footage)

2000s

6.9

Afro Samurai: Resurrection

Shichogoro (voice)

10.0

Adventures in Voice Acting

Self