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 | Lupe Q and the Galactic Earworms | Mr. Bob | 2027 |
| 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 Furever Friends | Lobo / Mrs. Howler (voice) | 2019-04-16 |
| Movie | Super Monsters Back to School | Lobo Howler (voice) | 2019-08-16 |
| 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 | Barbie in Rock 'N Royals | Clive / Prince Reginald (voice) | 2015-08-12 |
| Movie | Fatal Friends | Mr. Clark | 2015-05-16 |
| Movie | Leapfrog Letter Factory Adventures: Great Shape Mystery | Leap (voice) | 2015-09-01 |
| 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 |
| Series | Almost Human | Ramon Medina | 2013-11-17 |
| Movie | Barbie Mariposa & the Fairy Princess | Prince Carlos (voice) | 2013-08-25 |
| Movie | Watchmen | Rockefeller Military Base Technician | 2009-03-04 |
| Series | Hot Wheels Battle Force 5 | Zoom Takazumi (voice) | 2009-08-29 |
| Movie | Battlestar Galactica: The Plan | Felix Gaeta (archive footage) (uncredited) | 2009-10-27 |
| Series | Alice | 9 of Clubs | 2009-12-06 |
| Series | Riese: Kingdom Falling | Garin | 2009-11-02 |
| Movie | Love Happens | Tattoos | 2009-09-18 |
| 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 | Battlestar Galactica: Razor | Lt. Felix Gaeta | 2007-11-12 |
| 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 | Barbie Fairytopia: Mermaidia | Nalu (voice) | 2006-03-14 |
| Movie | Max Steel: Countdown | Berto (voice) | 2006-10-01 |
| Series | Ōban Star-Racers | Koji (voice) | 2006-06-05 |
| Movie | Barbie: Fairytopia | Prince Kai (voice) | 2005-03-08 |
| Movie | Bionicle 3: Web of Shadows | Vakama (voice) | 2005-10-11 |
| Movie | My Scene Goes Hollywood: The Movie | River (voice) | 2005-08-30 |
| Movie | Barbie as The Princess & the Pauper | Julian (voice) | 2004-09-28 |
| Movie | Max Steel: Endangered Species | Berto (voice) | 2004-01-05 |
| Movie | Jammin' in Jamaica | River (voice) | 2004-05-15 |
| Movie | Bionicle 2: Legends of Metru Nui | Vakama (voice) | 2004-10-06 |
| Series | Battlestar Galactica | Felix Gaeta | 2004-10-18 |
| Series | Legend of Earthsea | Skiorch | 2004-12-13 |
| Series | Battlestar Galactica | Felix Gaeta | 2003-12-08 |
| Movie | G.I. Joe: Spy Troops | Dusty (voice) | 2003-09-23 |
| Series | Taken | Unknown | 2002-12-02 |
| Series | Jeremiah | Unknown | 2002-03-03 |
| Series | Smallville | Unknown | 2001-10-16 |
| Movie | Final Destination | Guitar Player in Paris (uncredited) | 2000-03-17 |
| Series | X-Men: Evolution | Unknown | 2000-11-04 |
| Series | Dark Angel | Druid | 2000-10-03 |
| Series | Beast Machines: Transformers | Nightscream (voice) | 1999-09-18 |
| Series | Strange World | Unknown | 1999-03-08 |
| 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 |