
Alec Dougal Gillis is an Academy Award-winning American special effects artist and actor who served as part of the creature effects crew on the 1986 film Aliens, the 1992 film Alien3, the 1997 film Alien Resurrection, the 2004 film Alien vs. Predator, the 2007 film Aliens vs. Predator: Requiem and the 2018 film The Predator. He also appeared in a cameo as an unnamed technician in Alien vs. Predator, although he was not credited for the role.
In 1988, Gillis co-founded Amalgamated Dynamics, Inc. (ADI) with Tom Woodruff, Jr., and the company has since provided creature effects for Alien3, Alien Resurrection, Alien vs. Predator and Aliens vs. Predator: Requiem.
Gillis's work has won an Academy Award for Visual Effects (for Death Becomes Her, although he was not listed on the official nomination) and a BAFTA. For his work on Alien3, he was nominated for an Academy Award for Visual Effects, a BAFTA and a Saturn Award.

Aliens
1986 · as Alien (uncredited)

Prey
2022 · as Predator Puppeteer (ADI)

Alien Resurrection
1997 · as Hero Alien Warrior (uncredited)

AVP: Alien vs. Predator
2004 · as Technician (uncredited)

Ray Harryhausen: The Early Years Collection
2005 · as Self

Fleshing Out the Hollow Man
as Self

Men in Suits
2012 · as Self

Rakka
2017 · as Militia #1

Behind the Scenes of 'John Q'
2002 · as Self

Oats Studios: Volume 1
2021 · as Militia #1 / Bill

Children of the Atom - Filming X-Men: First Class
2011 · as Self

Astronaut: The Last Push
2012 · as Charlie

Starship Troopers: Know Your Foe
2002 · as Self

Creature Designers: The Frankenstein Complex
2015 · as Self

Shooting 'Panic Room'
2004 · as Self

Wreckage and Rage: Making 'Alien³'
2003 · as Self

Superior Firepower: Making 'Aliens'
2003 · as Self

Making Apes: The Artists Who Changed Film
2019 · as Self