Over the course of ten days and 435 miles, an unbreakable bond is forged between pro adventure racer Michael Light and a scrappy street dog companion dubbed Arthur. As the team is pushed to their outer limits of endurance in the race, Arthur redefines what victory, loyalty and friendship truly mean.
Mark Wahlberg
as Michael Light
Simu Liu
as Leo
Juliet Rylance
as Helen Light
Nathalie Emmanuel
as Olivia
Ali Suliman
as Chik
Bear Grylls
as Bear Grylls
Paul Guilfoyle
as Charlie Light
Rob Collins
as Decker Swanson
Alani iLongwe
as John
Cece Valentina
as Ruby
Roger Wasserman
as Santiago
Oscar Best
as Hugo
