With help from Olympic medalist Siobhan-Marie O'Connor, the "Star Wars" alum swapped Jedi training for swim training to play Gertrude Ederle in Joachim Rønning's biopic.

One such film, set to premiere at the end of the month, is “Young Woman and the Sea,” chronicling the remarkable journey of Gertrude “Trudy” Ederle, the first woman to swim across the English Channel.

Daisy Ridley, who plays Ederle, spoke about the tenacious swimmer. "The difficulties she faced was all the sorts of trials and tribulations of being a woman of that time. She just refused to be boxed in, puts in a lot of effort and starts winning absolutely everything."

Get a behind-the-scenes look at Young Woman and the Sea, an upcoming movie about the true story of Trudy Ederle, the first woman to successfully swim the English Channel. Daisy Ridley stars as the accomplished swimmer who was born to immigrant parents in New York City in 1905.