| cast |
 |
|
|
|
| Joseph Gordon-Levitt | Joseph Gordon-Levitt as Adam | Seth Rogen | Seth Rogen as Kyle |
| Anna Kendrick | Anna Kendrick as Katherine | Bryce Dallas Howard | Bryce Dallas Howard as Rachael |
| Anjelica Huston | Anjelica Huston as Diane | Jessica Parker Kennedy | Jessica Parker Kennedy as Jackie |
| Andrew Airlie | Andrew Airlie as Dr. Ross | Marie Avgeropoulos | Marie Avgeropoulos as Allison |
| Matt Frewer | Matt Frewer as Mitch | Philip Baker Hall | Philip Baker Hall as Alan |
| Serge Houde | Serge Houde as Richard | Veena Sood | Veena Sood as Nurse Stewart |
| William "Big Sleeps" Stewart | William "Big Sleeps" Stewart as George | |