Daisy Ridley

Trudy Ederle

Lilly Aspell

Young Meg Ederle

Sian Clifford

Charlotte 'Eppy' Epstein

Ethan Rouse

Henry Jr. (Teen)

Christopher Eccleston

Jabez Wolffe

Stephen Graham

Bill Burgess

Joachim Rønning

Executive Producer

Jeanette Hain

Gertrude Ederle

Glenn Fleshler

James Sullivan

John G. Scotti

Executive Producer

Kim Bodnia

Henry Ederle

Alex Hassell

Harry Horlick

Tilda Cobham-Hervey

Meg Ederle

Devina Vassileva

Aileen Riggin

Alexander Karim

Benji Zammit

Olive Abercrombie

Young Trudy Ederle

Raphael J. Bishop

Young Henry Jr. Ederle

Sebastian Griegel

Horst

Doc Butler

Uncle Ederle

Yordan Angelov

Karl Durshley

Robert Eades

Johnny Weissmuller

Hyoie O'Grady

Chip Anderson

Tessa Bonham Jones

Helen Wainwright

Vanina Yordanova

Millie

Saskia Vinkhuyzen

Ruth

Siobhan O'Connor

WSA Swimmer

Jeff Nathanson

Writer