Suggestions by @aahp

Alex Winter

as Director in The Gachatrix

Dave Bautista

as Depredator in The Gachatrix

Vin Diesel

as Tree Man in The Gachatrix

Tom Hardy

as Absorbs Bodies in The Gachatrix

Tony Hale

as Technological Alien in The Gachatrix

Keanu Reeves

as Hedgehog Soldier in The Gachatrix

RosyClozy

as Rosy in The Gachatrix

Kevin Quinn

as Vlad in The Gachatrix

Benjamin Flores Jr.

as Sean Everett in The Gachatrix

Emma Myers

as Milly Brooks in The Gachatrix

Jack Dylan Grazer

as Luke Peterson in The Gachatrix

Finn Wolfhard

as Zander Wickham in The Gachatrix

Bebe Wood

as Hailey Austin in The Gachatrix

Timothée Chalamet

as Jake Sterling in The Gachatrix

Christopher McDonald

as Divergent in The Gachatrix

Freya Skye

as Sam in The Gachatrix

Ayaamii Sledge

as Savannah in The Gachatrix

Lexi Janicek

as Tasha in The Gachatrix

Christian Convery

as Evan in The Gachatrix

Micah Abbey

as Adam in The Gachatrix