Tom Hardy as Eddie Brock / Venom

Woody Harrelson as Cletus Kasady / Carnage

Michelle Williams as Anne Weying

Naomie Harris as Frances Louise Barrison / Shriek

Reid Scott as Dr. Dan Lewis

Stephen Graham as Detective Mulligan

Peggy Lu as Mrs. Chen

Sian Webber as Dr. Pazzo

Michelle Greenidge as Mugging Victim

Rob Bowen as Beaten Mugger

Laurence Spellman as Patient

Little Simz as Little Simz

Jack Bandeira as Young Cletus

Olumide Olorunfemi as Young Shirek

Scroobius Pip as Siegfried

Amrou Al-Kadhi as Host Two

Beau Sargent as Host Three

Brian Copeland as Rodeo Beach Reporter

Stewart Alexander as Warden

Sean Delaney as Young Detective Mulligan

Ed Kear as Reveler

Emma Lau as Reveler

Louis J Rhone as Reveler

Christopher Godwin as Headmaster (1997)

Tiffanie Thomas as San Quentin Tier Guard

Rocky Capella as Valet Car Park

Sam Robinson as San Quentin Guard

Greg Lockett as San Francisco Police Department Officer

Sonny Ashbourne Serkis as Plunger Man

Otis Winston as Street Man

Vaughn Johseph as Tie Down Guard

Kristen Simoes as TV Reporter - San Quentin

Miguel Angel Arreguin as Gas Station Attendant

Shaliz Afshar as San Francisco Reporter

Reece Shearsmith as Priest

Simon Connolly as Grieving Father

Rachel Handshaw as Grieving Mother

Amanda Foster as Victim's Sister

Akie Kotabe as Victim's Brother

Eric Sigmundsson as Startled Witness

Chabris Napier-Lawrence as Ravenscroft Guard

Larry Olubamiwo as Ravenscroft Guard

Jose Palma as San Quentin Last Meal Guard

Ashlen Aquila as San Quentin Last Meal Guard

Jamal Ajala as Ravenscroft Orderly

James D. Weston II as San Quentin Commander

Che Amaro as San Quentin Guard

Joshua Eldridge-Smith as Sympathetic Guard

Rosie Marcel as Detective in Bathroom

Elliot Cable as Host Pre Carnival #1

J.K. Simmons as J. Jonah Jameson (uncredited)

Tom Holland as Peter Parker / Spider-Man (uncredited)

David Zepeda as Max Irázabal (uncredited)

Jason McNab as Talkative Red Jacket Reveller (uncredited)