Liam O'Brien
Actor

Liam O'Brien

Liam O'Brien is credited on 12 movies and 16 TV shows, best known by TMDB votes for Regular Show, Star Wars: The Bad Batch and Phineas and Ferb.

Born May 28, 1976 in Belleville, New Jersey, USA.

Filmography · 28 titles

US streaming apps shown for the 12 best-known titles, checked October 5, 2026. Tap any title for where it streams and what it costs.

About Liam O'Brien

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]

Biography from TMDB, written by its community.

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