Onslaught

Adria Arjona Celeste

Dan Stevens Dr. Hans Kammler

Eric Wareheim Kovacks

Reginald VelJohnson Josiah

Michael Biehn Baylor

Blake Kennedy Daisy

Alex Pereira The Butcher

Drew Starkey Cyrus

Rebecca Hall Frau Hanna Kammler

Jacob Scipio Griffin

Leon M. Brown Larkin

Dave Campbell The Cockroach

Tyler Hall The Crybaby

Jasper Keen Arlo

Abby Townsend Lily

Sarah Minnich Inger

Maurice Greene Teddy

Christian Calloway Tremaine

L.C. Holt Phil

Stephen Burhoe Diner Cook

Madeleine Schaefer Scovil Pistol MP

André Bédard Pistol MP

Jonathan Bédard Army Field Surgeon

Whitley Strieber Meditation Tape Guru

Mat Williams Sports Radio Commentator

Fanshen Cox Police Dispatcher

TK Shom Handler

Ashley Lambert Base Intercom Voice

Caleb Baker Patrolman (uncredited)

Rabon Hutcherson Scotty Mercenary (uncredited)

Jesse La Flair Kieran (uncredited)

Joanne Marie Trailer Park Resident (uncredited)

Steven Shelby The Cockroach (uncredited)

Malik Watson Aidan Mercenary (uncredited)

Keil Oakley Zepernick The Crybaby (uncredited)