Kyle Catlett

as T.S. Spivet

Helena Bonham Carter

as Dr. Clair

Judy Davis

as G.H. Jibsen

Callum Keith Rennie

as Father

Niamh Wilson

as Gracie

Jakob Davies

as Layton

Rick Mercer

as Roy

Robert Maillet

as Giant Hobo

Dominique Pinon

as Two Clouds

Julian Richings

as Ricky

Richard Jutras

as Lecturer

Mairtin O'Carrigan

as Lecturer

Michel Perron

as The vigilant

Dawn Ford

as Marge

Harry Strandjofski

as Policeman

Susan Glover

as Cathy

James Bradford

as Smithsonian President

Lisa Bronwyn Moore

as Judy

Felicia Shulman

as Jibsen's Secretary

Dylan Kingwell

as Little Boy

Eric Davis

as Towncar Driver

Rebecca Amzallag

as Reception Waitress

Amber Goldfarb

as Reception Waitress

Leigh Ann Taylor

as Smithsonian's Receptionist

Andrew Simms

as Reception Guest

Una Kay

as Reception Guest

Sylvia Stewart

as Reception Guest

Sabrina Reeves

as Reception Guest

Ana Alarcon

as Lady at train station

Zachary Amzallag

as Waiter

Kyle Allatt

as Photographer

Martin Brisebois

as Perpetual motion machine presenter

Victor Cornfoot

as Airport Officer

Christie Claymore

as Smithsonian Scientist's Date

Anne-Sophie Bozon

as Figuration

Kyle Gatehouse

as Student Butte Museum