Diana Nyad

Annette Bening

Bonnie Stoll

Jodie Foster

John Bartlett

Rhys Ifans

Nico

Ethan Jones Romero

Teenage Diana

Anna Harriette Pittman

Jon Rose

Garland Scott

Angel Yanigahara

Jeena Yi

Luke Tipple

Luke Cosgrove

Naomi

Erica Cho

Coach Jack Nelson

Eric T. Miller

Candace

Anne Marie Kempf

Dee Brady

Karly Rothenberg

Elise

Carolyn McCormick

Dude

Marcos Diaz

Diana (age 5)

Belle Darling

Aris Nyad

Johnny Solo

Diana (age 5)

Pearl Darling

Marcus-Diver

Marcus Young

Katie (Register Girl) (uncredited)

Samantha Gordon

Anna

Tisola Logan

Miguel

Hanler Rodríguez

Suzanne(as Acuña Báez Marcella)

Marcella Acuña Báez

Lucy

Harraka Eliana

Nina (uncredited)

Lilo Grunwald

Opposing Girl

Sophia Hernandez

Sam - Medic

Grace Subervi

Woman Swimmer

Katherine Klosterman

Reporter Cuba

Elizabeth Chahin

Taxi Driver

Toussaint Merionne

Paramedic (uncredited)

Mauricio Adrian

Nadia- Kayaker

Nadia Lorencz

Mia

Orpha Salimata

Carolyn

Katherine Montes

Jose Cuban Fisherman

Jose Mota Prestol

St. Maarten Kid #1

Marina Vasarhelyi-Chin

Coach Nelson's Assistant

Jake Jackson

St. Maarten Kid #2

James Vasarhelyi-Chin

Bikini Shopping Girl

Lacey Newhard

Janitor(uncredited)

Marcos Sánchez

Commentator

Stephen Schnetzer

Trainer

Iván Oleaga

Female Cop

Melissa R. Stubbs