Daisy Ridley

Character: Trudy Ederle

Tilda Cobham-Hervey

Character: Meg Ederle

Stephen Graham

Character: Bill Burgess

Kim Bodnia

Character: Henry Ederle

Jeanette Hain

Character: Gertrude Ederle

Glenn Fleshler

Character: James Sullivan

Sian Clifford

Character: Charlotte 'Eppy' Epstein

Christopher Eccleston

Character: Jabez Wolffe

Ethan Rouse

Character: Henry Jr. (Teen)

Olive Elise Abercrombie

Character: Young Trudy Ederle

Lilly Aspell

Character: Young Meg Ederle

Raphael J. Bishop

Character: Young Henry Jr. Ederle

Alex Hassell

Character: Harry Horlick

Alexander Karim

Character: Benji Zammit

Sebastian Griegel

Character: Horst

Doc Butler

Character: Uncle Ederle

Yordan Angelov

Character: Karl Durshley

Robert Eades

Character: Johnny Weissmuller

Hyoie O'Grady

Character: Chip Anderson

Devina Vassileva

Character: Aileen Riggin

Tessa Bonham Jones

Character: Helen Wainwright

Vanina Yordanova

Character: Millie

Saskia Vinkhuyzen

Character: Ruth

Siobhan O'Connor

Character: WSA Swimmer

Andy Sellers

Character: Starlight Pool Lifeguard

Dennis Billingsley

Character: Swim Instructor

Trevor Van Uden

Character: Chip's Friend

Cat Haave

Character: Annette Kellerman

Iliyana Koleva

Character: Australian Female Swimmer

Paolina Popova

Character: Australian Female Swimmer

Owen Davis

Character: Starlight Pool Announcer

Brian Caspe

Character: Starlight Pool Reporter

Nicholas Colicos

Character: Starlight Pool Reporter

Michael Fleming

Character: Radio Station Sound Man

Velizar Binev

Character: Doctor Weiss

Meglena Karalambova

Character: Sullivan's Mother

John Carew

Character: Jonas

Petar Stoychev

Character: English Channel Swimmer

Dimo Alexiev

Character: English Channel Swimmer

Kiril Efremov

Character: English Channel Swimmer

Kexin Wang

Character: English Channel Swimmer

Anton Poriazov

Character: English Channel Swimmer

Michael Amiar

Character: Boat Captain

Bashar Rahal

Character: Reporter on Boat

Sava Dragunchev

Character: Reporter on Boat

Simon Balcon

Character: Reporter at Beach

Roy Hill

Character: Reporter at Beach

Rosen Rosenov

Character: Alsace Bagpiper

Martin Lyamov

Character: Alsace Bagpiper

Justine Viotty

Character: French Nurse

David Calvitto

Character: Mayor Walker

Derek Morse

Character: USS American Crew Member

Paul Boichat

Character: England Customs Officer

Laila Barwick

Character: Young Girl in Butcher Shop

Tsvetan Marinov

Character: Coney Island Street Performer

JR Esposito

Character: Coney Island Cop

Lylianna Eugene

Character: Coney Island Young Girl

Quinn Patrick

Character: Carnival Barker

Ivan Panev

Character: Coney Island Man

Laura Hinton

Character: Coney Island Woman

Howard Chadwick

Character: English Pub Bartender

Mariyan Stefanov

Character: Babe Ruth

Jana Yakovleva

Character: Neighbor

Clive Sawyer

Character: Newsreel British Official

Robert Chapman

Character: Alsace Reporter

Euan Macnaughton

Character: Alsace Reporter