Daisy Ridley

(Trudy Ederle)

Tilda Cobham-Hervey

(Meg Ederle)

Stephen Graham

(Bill Burgess)

Kim Bodnia

(Henry Ederle)

Jeanette Hain

(Gertrude Ederle)

Glenn Fleshler

(James Sullivan)

Sian Clifford

(Charlotte 'Eppy' Epstein)

Christopher Eccleston

(Jabez Wolffe)

Ethan Rouse

(Henry Jr. (Teen))

Olive Elise Abercrombie

(Young Trudy Ederle)

Lilly Aspell

(Young Meg Ederle)

Raphael J. Bishop

(Young Henry Jr. Ederle)

Alex Hassell

(Harry Horlick)

Alexander Karim

(Benji Zammit)

Sebastian Griegel

(Horst)

Doc Butler

(Uncle Ederle)

Robert Eades

(Johnny Weissmuller)

Hyoie O'Grady

(Chip Anderson)

Tessa Bonham Jones

(Helen Wainwright)

Saskia Vinkhuyzen

(Ruth)

Trevor Van Uden

(Chip's Friend)

Cat Haave

(Annette Kellerman)

Paolina Popova

(Australian Female Swimmer)

Owen Davis

(Starlight Pool Announcer)

Brian Caspe

(Starlight Pool Reporter)

Nicholas Colicos

(Starlight Pool Reporter)

Velizar Binev

(Doctor Weiss)

Meglena Karalambova

(Sullivan's Mother)

John Carew

(Jonas)

Dimo Alexiev

(English Channel Swimmer)

Anton Poriazov

(English Channel Swimmer)

Bashar Rahal

(Reporter on Boat)

Sava Dragunchev

(Reporter on Boat)

Paul Boichat

(England Customs Officer)

Laila Barwick

(Young Girl in Butcher Shop)

JR Esposito

(Coney Island Cop)

Quinn Patrick

(Carnival Barker)

Clive Sawyer

(Newsreel British Official)

Euan Macnaughton

(Alsace Reporter)