| Shelby | 卡特里娜·宝登
 | |
| Mr. Goodman | 克里斯托弗·洛伊德
 | |
| Kyle | 克里斯·泽尔卡
 | |
| Maddy | 丹妮尔·帕娜贝克
 | |
| Deputy Fallon | 文·瑞姆斯
 | |
| Clayton | 加里·布塞
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| Alex | 杰奎琳·玛克林尼丝·伍德
 | |
| Chet | 大卫·科恩查内
 | |
| Josh | 让-卢克·比洛多
 | |
| Himself | 大卫·哈塞尔霍夫
 | |
| Ashley Fallon | 梅根·坦迪
 | |
| Andrew 'Drew' Cunningham | 保罗·舍尔
 | |
| Jenina Fallon | 伊莉丝·尼尔
 | |
| Thomas Fallon | Sam Jones III
 | |
| Mo | 克鲁·古拉格
 | |
| Big Dave | 阿德里安·马丁内兹
 | |
| Lifeguard Cody | 科迪·肯尼迪
 | |
| Barry | 马特·布什
 | |
| Pearl | Naomi Snieckus | |
| Kendra | Shanica Knowles | |
| Theo Fallon | 迈克尔·阿尔吉利
 | |
| Bella (as Mia Hope) | Marta Zolynska
 | |
| Travis | Paul James
 | |
| Bite Victim's Father | David Schifter | |
| Lizzie | Katie Garner | |
| Cannonball Girl | Beth Powder | |
| Rochelle | Jenna Hurt | |
| Hysteric | Alisa Harris | |
| Water Park Patron | Richard Wes Howren | |
| Male Staffer | Michael L. Kuhn | |
| Bloody Bather (uncredited) | Sheila Brothers | |
| Staring Kid (uncredited) | Truman Brothers | |
| Bethany (uncredited) | Sierra Fisk | |
| Saved Dead Woman (uncredited) | Beth Gosnell | |
| Bather (uncredited) | Sierra Holmes | |
| Mandy (uncredited) | Kathy Sue Holtorf | |
| Young Mom (uncredited) | 西尔维娅·杰弗里斯
 | |
| Freckled Boy (uncredited) | Matthew Lintz | |
| Dying Bikini Girl (uncredited) | 利维亚·米兰诺 | |
