Emily Blunt
Evelyn Abbott

John Krasinski
Lee Abbott

Millicent Simmonds
Regan Abbott

Noah Jupe
Marcus Abbott

Cillian Murphy
Emmett

Djimon Hounsou
Man on Island

Okieriete Onaodowan
Police Officer

Scoot McNairy
Marina Man

Zachary Golinger
Emmett's Son

Blake DeLong
Umpire

Cristalis Bonilla
Teen in Bar

Silas Pereira-Olson
Boy on Island

Alice Sophie Malyukova
Girl at Marina

Ashley Dyke
Woman on Island

Dean Woodward
Beau Abbott

Barbara Singer
Woman in Store

David Lundy
Marina Person

Michaela Pace
Oliver's Mom

Wayne Duvall
Roger (uncredited)

Lauren-Ashley Cristiano
Emmett's Wife (uncredited)

Logan V Davoli
Emmett's Older Son (uncredited)

Robert A. Coldicott
Townsperson (uncredited)

Scott Matheny
Townsperson (uncredited)

Gary Sundown
Island Person (uncredited)