Tom Hardy Eddie Brock / Venom Woody Harrelson Cletus Kasady / Carnage Michelle Williams Anne Weying Naomie Harris Frances Louise Barrison / Shriek Reid Scott Dr. Dan Lewis Stephen Graham Detective Mulligan Peggy Lu Mrs. Chen Michelle Greenidge Mugging Victim Laurence Spellman Patient Little Simz Little Simz Jack Bandeira Young Cletus Scroobius Pip Siegfried Amrou Al-Kadhi Host Two Brian Copeland Rodeo Beach Reporter Stewart Alexander Warden Sean Delaney Young Detective Mulligan Ed Kear Reveler Christopher Godwin Headmaster (1997) Rocky Capella Valet Car Park Greg Lockett San Francisco Police Department Officer Sonny Ashbourne Serkis Plunger Man Otis Winston Street Man Reece Shearsmith Priest Simon Connolly Grieving Father Rachel Handshaw Grieving Mother Amanda Foster Victim's Sister Akie Kotabe Victim's Brother Eric Sigmundsson Startled Witness Chabris Napier-Lawrence Ravenscroft Guard Larry Olubamiwo Ravenscroft Guard Jose Palma San Quentin Last Meal Guard Jamal Ajala Ravenscroft Orderly James D. Weston II San Quentin Commander J.K. Simmons J. Jonah Jameson (uncredited) Tom Holland Peter Parker / Spider-Man (uncredited)