| 角色 | 饰演者 | 角色介绍 |
| T. S. Spivet | 凯尔·凯特莱特 | |
| Dr. Clair | 海伦娜·伯翰·卡特 | |
| Giant Hobo | 罗伯特·梅耶 | |
| Jibsen | 朱迪·戴维斯 | |
| Father | 考乐姆·吉斯·雷尼 | |
| Ricky | Julian Richings | |
| Two Clouds | 多米尼克·皮诺 | |
| Layton | 雅各布·戴维斯 | |
| Gracie | Niamh Wilson | |
| Reception Waitress #2 | Amber Mullin | |
| Lecturer | Mairtin OCarrigan | |
| Marge | 道恩·福特 | |
| Mr. Stenpock | Richard Jutras | |
| Judy the Nurse | Lisa Bronwyn Moore | |
| Roy | Rick Mercer | |
| Senators Aide | 诺埃尔·伯顿 | |
| Actor | Andrew Simms | |
| Smithsonian Scientists Date | Christie Claymore | |
| Guest at Reception | Sylvia Stewart | |
| Smithsonian President | James Bradford | |
| Train Worker | Benoit Priest | |
| Cowboy | Marc Primeau | |
| Waiter | Zachary Amzallag | |
| Photographer | Kyle Allatt | |
| Cameraman | Mario Geoffrey | |
| Young Boy | Dylan Kingwell | |
| Airport Officer | Victor Cornfoot | |
| Classmate | Tommy Heynemand | |
| Classmate | Karyanne dAvril | |
| Reception Waitress | Marie-Chantal Nadeau | |
| Nerd | Patrick Hébert | |
| Smithsonian Receptionist | Leigh Ann Taylor | |
| Reception Waitress #3 | Rebecca Amzallag | |
| Pierre G | Roald Smeets |
