Sammi Hanratty as Chrissa Maxwell

Annabeth Gish as Meg Maxwell

Timothy Bottoms as Paul Maxwell

Michael Learned as Nana Louise Hanlon

Austin Thomas as Tyler Maxwell

Adair Tishler as Tara James

Ariela Barer as Sonali Matthews

Kaitlyn Dever as Gwen Thompson

Shelby Harmon as Jayden Johnson

Don Franklin as Mr. Beck

Joanne Baron as Mrs. Ziminsky

Christian Pikes as Joel

Jennifer Tilly as Mrs. Rundell

Kaylin Stewart as Alexandra

Lucy Angelo as Student

Ashley Ausburn as Swimmer (uncredited)

Maria Paula Gonzalez as Josefina (uncredited)

Grace Rolek as Additional voice (uncredited)

Preston Strother as Student (uncredited)

Tyler Strother as Student (uncredited)

Jennifer Parsons as Janine Thompson

David J Law as Swim Meet Official (uncredited)