
Allison Williams
Gemma

When robotics engineer Gemma becomes the guardian of her orphaned niece, Cady, she thinks her new invention, a robotic AI, will be a good companion. However, M3GAN begins to behave in unexpected and shocking ways.
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Allison Williams
Gemma

Violet McGraw
Cady

Ronny Chieng
David

Amie Donald
M3gan

Jenna Davis
M3gan

Brian Jordan Alvarez
Cole

Jen Van Epps
Tess

Stephane Garneau-Monten
Kurt

Lori Dungey
Celia

Amy Usherwood
Lydia

Jack Cassidy
Brandon

Michael Saccente
Greg
Samson Chan-Boon
Officer Carter

Kira Josephson
Ava
Renee Lyons
Holly

Millen Baird
Police Detective

Chelsie Florence
Nicole

Arlo Green
Ryan