Cast of Young Woman and the Sea

Daisy Ridley portrays Gertrude 'Trudy' Ederle, the tenacious and pioneering swimmer who sets out to conquer the English Channel.

Tilda Cobham-Hervey plays Margaret Ederle, the sister of Trudy, who provides support during her sibling's ambitious endeavor.

Stephen Graham takes on a currently unspecified role in the film.

Kim Bodnia appears as Henry, a character associated with Trudy's historic swim.

Jeanette Hain depicts Gertrud Ederle, a member of Trudy's familial or social circle.

Christopher Eccleston fills a currently unspecified role within the movie.

Ethan Rouse plays Henry Jnr Ederle, presumably related to the protagonist, Trudy.

Doc Butler portrays Uncle Jan, a character who has some influence or connection to Trudy's life and journey.

Yordan Angelov is cast in an unspecified role in the film.

Robert Eades steps into the role of Jonny Weissmuller, an iconic swimmer and actor, within the backdrop of Trudy's story.

Tessa Bonham Jones plays Helen Wainwright, a character involved in the narrative of Trudy Ederle's epic achievement.

Sava Dragunchev appears as Alsace Reporter, a character likely involved in the media portrayal of Trudy's feat.