| 角色 | 饰演者 | 角色介绍 |
| Dr. Alan Grant | 山姆·尼尔Sam Neill | 扮演格兰特博士 |
| Paul Kirby | 威廉姆·H·梅西/William H. Macy | 演出一名年届不惑，却对人生充满无力感的中年男子。 |
| Dr. Ellie Sattler | 劳拉·邓恩Laura Dern | |
| Amanda Kirby | 蒂娅·里欧妮Tea Leoni | |
| Billy Brennan | 亚历桑德罗·尼沃拉Alessandro Nivola | |
| Erik Kirby | 特拉沃·摩根Trevor Morgan | |
| Mr. Udesky | 迈克尔·杰特Michael Jeter | |
| Cooper | 约翰·迪尔John Diehl | |
| Mark Degler | 泰勒·尼科斯Taylor Nichols | |
| M.B. Nash | Bruce A. Young | |
| Ben Hildebrand | Mark Harelik | |
| Enrique Cardoso | Julio Oscar Mechoso | |
| Charlie(as Blake Bryan) | Blake Michael Bryan | |
| Cheryl Logan | Sarah Danielle Madison | |
| Hannah | 琳达·朴 | |
| Symposium Leader | Sonia Jackson | |
| Science Reporter | Bruce French | |
| Male Student | Bernard Zilinskas | |
| Female Student | Rona Benson | |
| Man in Suit | Frank Clem | |
| Paleontology Student(uncredited) | Karin M. Gaarder；Brad Everett Young | |
| University Professor at Symposium(uncredited) | Edward C. Gillow |
