Ezra Miller as Barry Allen / The Flash

Sasha Calle as Kara Zor-El / Supergirl

Michael Keaton as Bruce Wayne / Batman

Michael Shannon as General Zod

Ron Livingston as Henry Allen

Maribel Verdú as Nora Allen

Kiersey Clemons as Iris West

Antje Traue as Faora-Ul

Saoirse-Monica Jackson as Patty Spivot

Rudy Mancuso as Albert Desmond

Ed Wade as Court Reporter

Jeremy Irons as Alfred Pennyworth

Temuera Morrison as Thomas Curry

Sanjeev Bhaskar as David Singh

Sean Rogers as Gary

Kieran Hodgson as Sandwich Guy

Luke Brandon Field as Al Falcone

Ian Loh as Kid Barry

Karl Collins as Henry's Lawyer

Nikolaj Coster-Waldau as Pizza Guy

Poppy Shepherd as Flash Fan

Nina Barker-Francis as Flash Fan

Ava Hamada as Flash Fan

Maurice Chung as Flash Fan

Florence Wright as Baby Nurse

Bastian Antonio Fuentes as Tony's Son

Andoni Gracia as Tony

Alex Hank as Security Guard

Miki Muschietti as Crying Toddler

Rebecca Hiller as Toddler's Mother

Rob Hunt as Falcone's Crew

Jonny Stockwell as Falcone's Crew

Michael Byrch as Falcone's Crew

Bret Jones as Neighbour with Dog

Sue Maund as Neighbour with Dog

Alex Batareanu as Russian Captain

Andrei Nova as Russian Guard

Gabriel Constantin as Head Scientist

Oleg Mirochnikov as Scientist

Katia Elizarova as Scientist

Denis Khoroshko as Scientist

Zsuzsa Magyar as Scientist

Michael Lerman as Scientist

Rosie Ede as Thomas Curry's Wife

Andy Muschietti as Hot Dog Reporter

Ellie Rawnsley as Metropolis Reporter

Greg Lockett as Gotham Reporter

Chelsea Leigh Macleod as Gotham Reporter

Leslie Soo as Staff Nurse

Freya Evans as Woman in Park

Sue Moore as Woman with Shopping Cart

Lynn Farleigh as Judge

Martin Pemberton as Ambulance Driver

Sarah Lawn as Magician

David Calvitto as Batman Suit Performer

Ben Affleck as Bruce Wayne / Batman (uncredited)

Gal Gadot as Diana Prince / Wonder Woman (uncredited)

George Clooney as Bruce Wayne (uncredited)

Jason Momoa as Arthur Curry / Aquaman (uncredited)