Adrien Brody

Stacy

Antonio Banderas

Blue

John Malkovich

Walker

Rory Culkin

Gage

Ori Pfeffer

The Handler

Alexandra Dinu

Grace

James Robinson

Young Gage

Deyan Petrov

Young Walker

Jason Francis

Young Gage's Father

Clive Sawyer

Truffle Dog Master

Keith D. Evans

Security Guard

Kitodar Todorov

Referee

Mark Theodore Richards

The Russian's Owner

Tihomir Vinchev

The Russian's Handler

Dimiter Doichinov

Second Cop

Owen Davis

Chef

Josh Ethier

The Ride

Velizar Binev

Old Man (uncredited)

Jeko Bogoslovov

K-9 Cop