Alessandro Juliani is a Canadian actor and singer. He is notable for playing the roles of Tactical Officer Lieutenant Felix Gaeta on the Sci-Fi Channel television program Battlestar Galactica, and Emil Hamilton in Smallville. He is also known for voicing the character L in the English version of the anime series Death Note and its live action films, as well as several other animation projects. Juliani can currently be seen as Sinclair on the CW series The 100 and is currently voicing Aaron Fox on Nexo Knights.
| Movie | Windows to the Soul | Archbishop (voice) | 2025-05-17 |
| Series | Supernatural Academy | Jonathon Lebron (voice) | 2022-01-20 |
| Movie | Needle in a Timestack | Steven | 2021-10-15 |
| Movie | Revisor | Postmaster Wieland (voice) | 2020-05-24 |
| Movie | Super Monsters Back to School | Lobo Howler (voice) | 2019-08-16 |
| Movie | Super Monsters Furever Friends | Lobo / Mrs. Howler (voice) | 2019-04-16 |
| Movie | Super Monsters Save Christmas | (voice) | 2019-11-26 |
| Movie | Super Monsters and the Wish Star | Lobo Howler (voice) | 2018-12-07 |
| Movie | War for the Planet of the Apes | Spear | 2017-07-11 |
| Series | Super Monsters | Lobo Howler (voice) | 2017-10-13 |
| Movie | Ratchet & Clank | Solana Trooper (voice) | 2016-04-13 |
| Series | Kong: King of the Apes | Chatter / Lukas Remy (voice) | 2016-04-15 |
| Movie | Fatal Friends | Mr. Clark | 2015-05-16 |
| Movie | Leapfrog Letter Factory Adventures: Great Shape Mystery | Leap (voice) | 2015-09-01 |
| Movie | Barbie in Rock 'N Royals | Clive / Prince Reginald (voice) | 2015-08-12 |
| Series | The Magicians | Sawbones | 2015-12-16 |
| Series | LEGO Nexo Knights | Aaron | 2015-12-13 |
| Movie | LeapFrog: Letter Factory Adventures - The Letter Machine Rescue Team | Leap (voice) | 2014-03-04 |
| Series | The 100 | Jacapo Sinclair | 2014-03-19 |
| Series | Motive | Serge Bisson | 2013-02-03 |
| Movie | Man of Steel | Officer Sekowsky | 2013-06-12 |
| Series | Eve of Destruction | Geoff Baines | 2013-04-15 |
| Movie | Baby Sellers | David Azevedo | 2013-08-17 |
| Movie | Barbie Mariposa & the Fairy Princess | Prince Carlos (voice) | 2013-08-25 |
| Series | Almost Human | Ramon Medina | 2013-11-17 |
| Series | Hot Wheels Battle Force 5 | Zoom Takazumi (voice) | 2009-08-29 |
| Movie | Watchmen | Rockefeller Military Base Technician | 2009-03-04 |
| Movie | Love Happens | Tattoos | 2009-09-18 |
| Series | Riese: Kingdom Falling | Garin | 2009-11-02 |
| Movie | Battlestar Galactica: The Plan | Felix Gaeta (archive footage) (uncredited) | 2009-10-27 |
| Series | Alice | 9 of Clubs | 2009-12-06 |
| Movie | Barbie Mariposa | Prince Carlos (voice) | 2008-02-26 |
| Movie | Max Steel: Bio Crisis | Berto (voice) | 2008-10-01 |
| Movie | Elegy | Actor #3 in Play | 2008-08-08 |
| Movie | Barbie as the Island Princess | Prince Antonio (voice) | 2007-09-17 |
| Series | Reaper | Unknown | 2007-09-25 |
| Movie | Chaos Theory | Ken | 2007-10-26 |
| Movie | Battlestar Galactica: Razor | Lt. Felix Gaeta | 2007-11-12 |
| Movie | Barbie Fairytopia: Mermaidia | Nalu (voice) | 2006-03-14 |
| Series | Ōban Star-Racers | Koji (voice) | 2006-06-05 |
| Movie | Max Steel: Countdown | Berto (voice) | 2006-10-01 |
| Movie | Barbie: Fairytopia | Prince Kai (voice) | 2005-03-08 |
| Movie | My Scene Goes Hollywood: The Movie | River (voice) | 2005-08-30 |
| Movie | Bionicle 3: Web of Shadows | Vakama (voice) | 2005-10-11 |
| Movie | Jammin' in Jamaica | River (voice) | 2004-05-15 |
| Movie | Max Steel: Endangered Species | Berto (voice) | 2004-01-05 |
| Movie | Barbie as The Princess & the Pauper | Julian (voice) | 2004-09-28 |
| Movie | Bionicle 2: Legends of Metru Nui | Vakama (voice) | 2004-10-06 |
| Series | Legend of Earthsea | Skiorch | 2004-12-13 |
| Series | Battlestar Galactica | Felix Gaeta | 2004-10-18 |
| Movie | G.I. Joe: Spy Troops | Dusty (voice) | 2003-09-23 |
| Series | Battlestar Galactica | Felix Gaeta | 2003-12-08 |
| Series | Jeremiah | Unknown | 2002-03-03 |
| Series | Taken | Unknown | 2002-12-02 |
| Series | Smallville | Unknown | 2001-10-16 |
| Series | X-Men: Evolution | Unknown | 2000-11-04 |
| Movie | Final Destination | Guitar Player in Paris (uncredited) | 2000-03-17 |
| Series | Dark Angel | Druid | 2000-10-03 |
| Series | Strange World | Unknown | 1999-03-08 |
| Series | Beast Machines: Transformers | Nightscream (voice) | 1999-09-18 |
| Series | Stargate SG-1 | Eliam | 1997-07-27 |
| Series | The Adventures of T-Rex | (voice) | 1992-09-18 |
| Series | Captain N: The Game Master | Kid Icarus (voice) | 1989-09-09 |