The M3GAN cast features Allison Williams, Violet McGraw and Ronny Chieng. This info article contains minor spoilers and character details for Gerard Johnstone’s 2022 movie on Peacock. Check out more streaming guides in Vague Visages’ Know the Cast section.

M3GAN focuses on a roboticist who develops a game-changing artificial intelligence program. After a familial tragedy, Gemma looks after her nine-year-old niece. The narrative follows the main protagonist as she watches her tech creation transform into a killer. Here’s every actor and character in M3GAN.

Read More at VV — Know the Cast & Characters: ‘Knock at the Cabin’

M3GAN Cast: Allison Williams as Gemma

Character Profile: A roboticist for Funki. She looks after her late sister’s daughter. Gemma intends to create advanced technology that can’t be replicated.

Williams’ Resume: Jillian in The Mindy Project (2013), Marnie Michaels in Girls (2012-17), Rose Armitage in Get Out (2017), Kit Snicket in A Series of Unfortunate Events (2018-19), Charlotte in The Perfection (2018)

Read More at VV — Know the Cast & Characters: ‘Red Rose’

M3GAN Cast: Violet McGraw as Cady

Character Profile: Gemma’s nine-year-old niece. She struggles emotionally after her parents’ deaths. Cady develops a meaningful friendship with an advanced AI program.

McGraw’s Resume: Young Nell in The Haunting of Hill House (2018), Shopping Cart Kid in Ready Player One (2018), Alice in Jett (2019), Young Yelena in Black Widow (2021), Ella in I Believe in Santa (2022)

Read More at VV — Know the Cast & Characters: ’47 Meters Down: Uncaged’

M3GAN Cast: Ronny Chieng as David

Character Profile: The CEO of Funki. He agrees to fund Gemma’s advanced tech creation. David intends to maximize pop culture buzz.

Chieng’s Resume: A Stand-Up Comedian — Also: Eddie Cheng in Crazy Rich Asians (2018), Greg Yao in Young Rock (2021-22), Jon Jon in Shang-Chi and the Legend of the Ten Rings (2021), Dr. Lee in Doogie Kamealoha, M.D. (2021)

Read More at VV — Know the Cast & Characters: ‘Viking Wolf’

M3GAN Cast: Brian Jordan Alvarez as Cole

Character Profile: Gemma’s co-worker. He believes that the M3GAN doll is too small to harm anybody. Cole worries about a product launch date.

Alvarez’s Resume: Wesley Masters in Jane the Virgin (2015-16), Caleb in The Gay and Wondrous Life of Caleb Gallo (2016), Jayson/Robert in Get Shorty (2017-19), Estefan Gloria in Will & Grace (2018-20), Derek in 80 for Brady (2023)

Read More at VV — Know the Cast & Characters: ‘Sick’

M3GAN Cast: Jen Van Epps as Tess

Character Profile: Gemma’s co-worker. She believes that M3GAN should be a support system for Cady and not a maternal replacement. Tess feels confident in her “spontaneous response” programming.

Van Epps’ Resume: Brenda in Cowboy Bebop (2021), Mother in Power Rangers Dino Fury (2021), Nicole in Don’t Make Me Go (2022), Harper King in One Lane Bridge (2022), Jane in The Royal Treatment (2022)

Read More at VV — Know the Cast & Characters: ‘Servant’

M3GAN Cast: Stephane Garneau-Monten as Kurt

Character Profile: Gemma’s co-worker. He steals sensitive company files. Kurt gets treated poorly by David.

Garneau-Monten’s Resume: Homeless Junkie in Hemlock Grove (2014), Mr. Armbruster in Murdoch Mysteries (2017), Nord in Straight Forward (2019), Timothee in The New Legends of Monkey (2020), Researcher in Sweet Tooth (2021)

Read More at VV — Know the Cast & Characters: ‘The Menu’

The M3GAN cast also includes:

• Amie Donald as M3GAN
• Jenna Davis as M3GAN (Voice)
• Lori Dungey as Celia
• Amy Usherwood as Lydia
• Jack Cassidy as Brandon
• Michael Saccente as Greg
• Samson Chan-Boon as Officer Carter
• Kira Josephson as Ava
• Renee Lyons as Holly
• Millen Baird as Police Detective

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.