Liam Christopher O'Brien (born May 28, 1976) 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. His major anime roles include Gaara in Naruto, Captain Jushiro Ukitake in Bleach, Lloyd in Code Geass, and Kenzo Tenma in Monster. In animation, he voices in shows such as Star Wars Rebels, Transformers: Robots in Disguise, Avengers Assemble, Wolverine and the X-Men, and Hulk and the Agents of S.M.A.S.H.. In video games, he voiced Gollum in Middle-Earth: Shadow of Mordor, Caius Ballad in Final Fantasy XIII-2, War in Darksiders, Asura in Asura's Wrath, Illidan Stormrage in World of Warcraft, Yasuo in League of Legends, the Warden in For Honor, Barker in Titanfall 2 and most recently, Infinite in Sonic Forces. He has directed for Naruto, The Last of Us, Evolve, Resident Evil 5, and Resident Evil 6. He is a regular cast member of Critical Role, playing Vax'ildan "Vax" Vessar and Caleb Widogast.
O'Brien in 2017
Liam Christopher O'Brien
May 28, 1976
|Residence||Los Angeles, California, U.S.|
|Alma mater||New York University Tisch School of the Arts|
|Occupation||Voice actor, ADR writer, voice director|
|Known for||Critical Role|
|Naruto as Gaara |
Critical Role as Vax'ildan Vessar & Caleb Widogast
O'Brien grew up in Weehawken, New Jersey. His mother Lois Wiltse O'Brien worked as an educator and as a quality assurance trainer and consultant. He started getting into acting in high school. After attending New York University Tisch School of the Arts, he worked in theater on various productions around the country. While working on a production of Romeo & Juliet in Cincinnati, he met Crispin Freeman, who helped him get into voice-over in cartoons and anime back in New York City.
|Between the Sheets; Liam O'Brien Interview - YouTube|
O'Brien married fellow voice actress Amy Kincaid in 2002. They have two children, a son and a daughter. O'Brien also has a sister named Cara. As mentioned in his interview with Brian W. Foster in Between the Sheets, O'Brien mentioned that has a condition called hyperacusis, a condition that affects how you perceive sounds. 
O'Brien's characters have varied in terms of styles. He affirms that he plays characters that are typically insane or evil geniuses, although he has also voiced comedic characters such as Fukuyama in Girls Bravo where he said he would "break out in a sweat matching his level of nuttiness". He describes Cumore from Tales of Vesperia as "slightly unhinged". In Darksiders, he voices the lead character War, one of the Four Horsemen of the Apocalypse. He describes his voicing as deeper than his usual voice, and that he portrayed him as a fairly old soul who isn't surprised at the events around him. In the video game-based film Final Fantasy VII: Advent Children he voiced Red XIII.
In addition to voice acting, O'Brien has worked as a voice director and writer on various video games and anime shows. He also participates in a web series called Critical Role, where various actors band together to play Dungeons & Dragons.
|2001||Boogiepop Phantom||Yoji Suganuma, others||CA|
|2002||His and Her Circumstances||Hideki Asaba, Fukada Kohei||CA|
|2002||Revolutionary Girl Utena||Mamiya Chida||CA|
|2003||K.O. Beast||Bud Mint||CA|
|2004||.hack//Legend of the Twilight||Tom||CA|
|2004||Gad Guard||Truck Driver||CA|
|2004||R.O.D.||Various characters||Also as William Markham||CA|
|2004||Ghost in the Shell: Stand Alone Complex||Various characters||CA|
|2004||Paranoia Agent||Mitsuhiro Maniwa, Man on Phone 2||CA|
|2004||Comic Party||Taishi Kuhonbutsu||CA|
|2004||Gungrave||Executive A, Researcher, Sam||CA|
|2004||Marmalade Boy||Akira Mizutani, Alex||CA|
|2005||Girls Bravo||Kazuharu Fukuyama|||
|2005||Rumiko Takahashi Anthology||Ryuichi, Mover, Odagiri, Zashiki Warashi, Gorgeous||CA|
|2005||Samurai Champloo||Young Yamane, Eel Shop Owner, others||CA|
|2005||Daphne in the Brilliant Blue||Various characters||CA|
|2005||Koi Kaze||Kei Odagiri, Man, Friend A||CA|
|2005||Duel Masters: Season 2||Shobu Kirifuda||CA|
|2005||Tenjho Tenge||Shin Natsume||CA|
|2005||The Melody of Oblivion||Horu, Person of the Cape||CA|
|2005||Mermaid Forest||Yuta, others||CA|
|2005||Ghost Talker's Daydream||Various characters||CA|
|2005||Naruto||Gaara, Kotetsu Hagane||CA|
|2005||Ghost in the Shell: Stand Alone Complex 2nd GIG||Gino, others||CA|
|2005||Gankutsuou: The Count of Monte Cristo||Andrea Cavalcanti||CA|
|2005||Saiyuki Reload||Various characters||CA|
|2005||Leave it to Piyoko!||Thin Blob||OVA||CA|
|2006||Boys Be...||Makoto Kurumizawa||Voice director and script writer|||
|2006||Kannazuki no Miko||Tsubasa||CA|
|2006||Saiyuki Reload Gunlock||Rin's Captor, Subordinate||CA|
|2006||Gun Sword||Ray Lundgren, Wild Bunch C||CA|
|2006||Kamichu!||Shika, Inu Osho, Konoha Kamaitachi, others||CA|
|2006||The Prince of Tennis||Various characters||CA|
|2006||Ergo Proxy||Vincent Law||CA|
|2006||Paradise Kiss||Various characters||CA|
|2007||To Heart||Various characters||CA|
|2007||Cutie Honey||Seiji's Contact||live-action dub||CA|
|2007||The Melancholy of Haruhi Suzumiya||Baseball Team Captain||CA|
|2007||The Third: The Girl With the Blue Eye||Various characters|||
|2008||Code Geass series||Lloyd Asplund||CA|
|2008||Buso Renkin||Gota Nakamura, Hideki Okakura||CA|
|2008||Descendants of Darkness||Hisoka Kurosaki||CA|
|2010||Slayers series||Rezo||Revolution and Evolution-R|||
|2013||Nura: Rise of the Yokai Clan - Demon Capital||Hidemoto Keikain|||
|2013–15||Digimon Fusion||Deckergreymon, Neptunmon, Mercurymon, others|||
|2014–15||Sailor Moon||Nephrite||Viz dub|||
|2015||Mobile Suit Gundam: The Origin||Gihren Zabi|||
|2015||Sailor Moon Crystal||Nephrite|||
|2016||Sengoku Basara: End of Judgement||Ieyasu Tokugawa|||
|2018||Baki||Atsushi Suedou, Valentin Sokolov||2018 ONA|||
|2019||Boruto: Naruto Next Generations||Gaara|||
|2019||Ultraman||Dan Moroboshi||2019 ONA|||
|Year||Title||Role||Crew role, Notes||Source|
|2008–09||Wolverine and the X-Men||Warren Worthington III/Angel/Archangel, Nightcrawler, Nitro|||
|2010||G.I. Joe: Renegades||Captain Anatoly Krimov/Red Star, others||Ep. "Union of the Snake"|||
|2012-14||NFL Rush Zone||RZ6.0/Richard Zimmer, Zich, others|||
|2013–17||Avengers Assemble||Red Skull / Iron Skull, Doctor Strange, Blood Brother #2, Skully, Skull-Net, others|||
|2013||Phineas and Ferb: Mission Marvel||Red Skull|||
|2014–15||Hulk and the Agents of S.M.A.S.H.||Arkon, Red Skull, others|||
|2014||Regular Show||Tango||Ep. "Gold Watch"|||
|2014–17||Star Wars Rebels||Supply Master Yogar Lyste, Morad Sumar, others|||
|2015||Transformers: Robots in Disguise||Underbite, Kickback, others|||
|2016||Ultimate Spider-Man||Doctor Strange||Ep. "Miles from Home"|||
|2016||Pickle and Peanut||Head Mannequin||Ep. "Bats/Movie Camp Out"|||
|2019||Carmen Sandiego||Professor Gunnar Maelstrom, Vlad, Boris|||
|Year||Title||Role||Crew role, Notes||Source|
|2005||Aquarian Age the Movie||Lancelot Army Commander||CA|
|2006||Patlabor: The Movie||Det. Kataoka||Bandai Visual dub||CA|
|2006||Final Fantasy VII: Advent Children||Red XIII|||
|2009||Afro Samurai: Resurrection||Shichigoro|||
|2012||Sengoku Basara: The Last Party||Ieyasu Tokugawa|||
|2014||JLA Adventures: Trapped in Time||Aquaman, Batwing Computer|||
|2014||Iron Man & Captain America: Heroes United||Red Skull|||
|2015||Tiger & Bunny: The Rising||Lunatic / Yuri Petrov|||
|2015||The Last: Naruto the Movie||Gaara, Kotetsu Hagane|||
|2016||Hulk: Where Monsters Dwell||Doctor Strange|||
|Year||Title||Role||Crew role, Notes||Source|
|2005||One Missed Call||Hiroshi Yamashita||CA|
|2015–present||Critical Role||Vax'ildan (campaign 1), Caleb Widogast (campaign 2)||Cast member, RPG web series|||
|2015||The Phoenix Incident||Jacob Reynolds|||
- Hague, Jim (May 13, 2000). "Catch a rising star; Weehawken native O'Brien enjoying meteoric climb as an actor; stars in Tennessee Williams play in New York - Liam O'Brien doesn't know exactly when the acting bug bit him - it was probably some time during his high school days..." The Hudson Reporter. Retrieved November 1, 2016.
- Dave Ward. "Liam O'Brien Interview". rpgsite.net. Retrieved May 13, 2016.
- Liam O'Brien and Sam Riegel (December 1, 2012). "All Work No Play" (Podcast). Event occurs at 3:17. Retrieved December 8, 2014.
- "Liam O'Brien on Twitter". Twitter. Retrieved May 29, 2016.
- Spangler, Todd (March 8, 2019). "Critical Role Team, After Record-Breaking Fan Crowdfunding Response, Vows to Make 'The Best Goddamn Cartoon Anyone Has Ever Seen'". Variety. Retrieved May 11, 2019.
- "Lois Wiltse O'Brien's Obituary on The Jersey Journal". nj.com. Retrieved November 1, 2016.
- "In the Void of the Damned, a Desire to Hold On". The New York Times. July 1, 1999. Retrieved November 1, 2016.
- Sommer, CurtainUp,Elyse. "Small Craft Warnings, a CurtainUp review". curtainup.com. Retrieved November 1, 2016.
- Liam O'Brien Interview - AfterBuzz TV's The Voice Of. July 14, 2015. Retrieved May 29, 2016 – via YouTube.
- "Between the Sheets: Liam O'Brien". Critical Role.
- "Critical Role's Liam O'Brien Talks His Love of Dungeons & Dragons". Geek and Sundry. Retrieved May 13, 2016.
- "Behind The Voice Actors – Liam O'Brien". Behind The Voice Actors. Check mark indicates role has been confirmed using screenshots of closing credits and other reliable sources. Retrieved October 18, 2017.
- Santos, Carlo (October 12, 2005). "Girls Bravo". Anime News Network. Retrieved March 26, 2015.
Liam O'Brien is a riot and a half as Fukuyama in this volume, and his character ought to go terrorize more girls just so we can hear that smarmy delivery.
- "Hare+Guu – Cast – Dr. Clive". Hare+Guu (squarespace). Retrieved March 19, 2017.
- "A Big, Black, Hard, Shiny, Smelly, Noise-Making Creature". Hare+Guu. Episode 9. Event occurs at Closing credits, English Voice Cast.
- "Cherry Blossoms". Boys Be.... Episode 1. Manga Entertainment. 2006. Event occurs at 22:40 director and writer credit, 22:45 character credit. Retrieved July 8, 2014.
- "Sword Dancer". The Third: The Girl with the Blue Eye. Event occurs at Closing credits, English Cast – via YouTube.
- Slayers Evolution-R. Episode 1. Funimation.
- Slayers Evolution-R. Episode 9–13. Funimation.
- "Neon Alley Reveals Nura: Rise of the Yokai Clan: Demon Capital Dub Cast". April 4, 2013. Retrieved December 29, 2016.
- "New Sailor Moon Dub Cast Revealed at Anime Expo". Anime News Network. July 5, 2014.
- "Gundam the Origin I's 1st 7 Minutes English-Dubbed & Subtitled". Anime News Network. Retrieved May 13, 2015.
- "'Mobile Suit Gundam: The Origin – Sorrowful Artesia' Anime Episode Gets English Language Trailer". The Fandom Post. Retrieved March 22, 2015.
- "Second 'Mobile Suit Gundam: The Origin' Anime Episode Titled". The Fandom Post. Retrieved March 22, 2015.
- "Viz Media Reveals More English Dub Cast for Sailor Moon R Anime". April 3, 2015. Retrieved April 4, 2015.
- "Rift". Sengoku Basara: End of Judgement. Episode 1 – via Funimation.com.
- "Air Duel". Baki. Episode 10. USA: Netflix. Event occurs at Closing credits, English Language Cast.
- "Mr. Oliva". Baki. Episode 13. USA: Netflix. Event occurs at Closing credits, English Language Cast.
- "Twitter". Twitter. Retrieved March 31, 2019.
- Ultraman. Episode 3. USA: Netflix. Event occurs at Closing credits, English Language Cast.
- "Liam O'Brien - SBV Talent". sbvtalent.com. Retrieved May 13, 2016.
- "Spark of Rebellion". Star Wars Rebels. October 3, 2014. Event occurs at 43:07. Disney Channel.
- "Miles From Home". Ultimate Spider-Man. Season 4. Episode 3. February 28, 2016. Disney XD.
- "Bats/Movie Camp Out". Pickle and Peanut. Season 1. Episode 17. June 20–27, 2016. Disney XD.
- "Liam O'Brien". TV Guide. Retrieved January 23, 2018.
- "Tiger & Bunny The Movie: The Rising 'New Driver' English Dub Clip Streamed". February 22, 2015. Retrieved July 13, 2015.
- "First Clip From Marvel's Hulk: Where Monsters Dwell". October 10, 2016. Retrieved October 10, 2016.
- BioWare. Dragon Age: Origins. Electronic Arts. Scene: Closing credits, 6:20 in, Additional Voices.
- Volition Inc. Red Faction: Guerrilla. THQ. Scene: Closing credits, 5:05 in.
- "The voice of Yasuo and many more: Interview with Liam O'Brien - Articles - Team Dignitas". team-dignitas.net. Retrieved November 1, 2016.
- "Fable III Game Credits". Microsoft Game Studios. Retrieved November 21, 2014.
- "We're the Yasuo team. AMA! • /r/leagueoflegends". reddit.com. Retrieved June 23, 2016.
- "Killer is Dead To Have Dual Audio Voice Tracks". Siliconera. Retrieved May 13, 2016.
- Sonic Team. Sonic Lost World. Sega. Scene: Closing credits, 1:08 in, English Character Voices.
- Dealzon. "Voice cast for Middle-earth: Shadow of Mordor revealed". Destructoid. Retrieved May 13, 2016.
- Traveller's Tales. Lego Dimensions. Warner Bros. Interactive Entertainment. Scene: Closing credits, 4:45 in, Voiceover Talent.
- "Credits - DIMENSIONS LEGO.com". lego.com. Retrieved November 1, 2016.
- Avalanche Studios. Mad Max. Warner Bros. Interactive Entertainment. Scene: Credits, 5:40 in, Talent.
- O'Brien, Liam (September 13, 2015). "@courtenaytaylor @MadMaxGame @jason_spisak @WillingBlam @Bloodmime My main role is Gut Gash. So handsome". Twitter. Retrieved September 27, 2017.
- Liam O'Brien [@VoiceOfOBrien] (January 26, 2016). "Best thing about my job is the variety. The Witness & LEGO Marvel's Avengers out today, and I was fortunate to direct VO on both. Go play" (Tweet). Retrieved May 12, 2016 – via Twitter.
- Sonic Team. Mario & Sonic at the Rio 2016 Olympic Games. Wii. Sega. Scene: Closing credits, 3:10 in, English Character Voices.
- Capcom. Street Fighter V. Capcom. Scene: Closing credits, Voice Actors.
- @VoiceOfOBrien (May 16, 2017). "So, who's picking up @InjusticeGame today?" (Tweet). Retrieved May 16, 2017 – via Twitter.
- Sawyer, Josh (May 8, 2018), Pillars of Eternity II: Deadfire, Ashley Johnson, Laura Bailey, Liam O'Brien, retrieved June 11, 2018
- "Obsidian #Deadfire on Twitter". Twitter. Retrieved June 11, 2018.
- "Critical Role's Liam O'Brien Talks His Love of Dungeons & Dragons - Geek and Sundry". geekandsundry.com. September 10, 2015. Retrieved February 14, 2017.
- Knox, Kelly (January 16, 2018). "Your First Look at the Official Art for the Second Critical Role Campaign". Geek & Sundry. Retrieved January 24, 2018.
- "The Phoenix Incident, Where Truth Battles Fiction - ACED Magazine". acedmagazine.com. April 8, 2016. Retrieved February 14, 2017.
- Jozef, Steve (April 8, 2016). "Phoenix Lights Thriller The Phoenix Incident Doesn't Shine Very Bright". phoenixnewtimes.com. Retrieved February 14, 2017.
- "The Phoenix Incident Builds An Interesting World; But Lacks Meaningful Characters - A Review". bleedingcool.com. April 7, 2016. Retrieved February 14, 2017.
- Jeng, Way (July 18, 2006). "Being a Brief Discussion with Liam O'Brien About Koi Kaze". Mania. Demand Media. Archived from the original on November 5, 2014.
- Bertschy, Zac; Sevakis, Justin (January 28, 2010). "The Liam King – ANNCast". Anime News Network.
- "Kana's Korner" Interview With Liam O'Brien on 91.8 The Fan