Olivia DeJonge as Rebecca Jamison

Ed Oxenbould as Tyler Jamison

Deanna Dunagan as Nana

Peter McRobbie as Pop Pop

Kathryn Hahn as Loretta Jamison

Celia Keenan-Bolger as Stacey

Samuel Stricklen as Conductor

Patch Darragh as Dr. Sam

Jorge Cordova as Miguel

Steve Annan as Man on the Street

Benjamin Kanes as Dad

Ocean James as Young Becca

Seamus Moroney as Young Tyler

Dave Jia as Cruise Passenger (uncredited)

Sajida De Leon as Cruise Passenger (uncredited)

John Buscemi as Police Officer (uncredited)

Richard Barlow as Police Officer (uncredited)

Shelby Lackman as J. Smith (uncredited)