 Colin FarrellSteven Murphy | Steven Murphy |
 Nicole KidmanAnna Murphy | Anna Murphy |
 Barry KeoghanMartin Lang | Martin Lang |
 Raffey CassidyKim Murphy | Kim Murphy |
 Sunny SuljicBob Murphy | Bob Murphy |
 Bill CampMatthew Williams | Matthew Williams |
 Alicia SilverstoneMartin's Mother | Martin's Mother |
| HHerb CaillouetEd Thompson (Hospital Director) | Ed Thompson (Hospital Director) |
| BBarry G. BernsonDr. Larry Banks | Dr. Larry Banks |
 Denise Dal VeraMary Williams | Mary Williams |
| DDrew LoganPrincipal | Principal |
| MMichael TresterElderly Man | Elderly Man |
 Anita Farmer BergmanNurse (uncredited) | Nurse (uncredited) |
 Lea Hutton BeasmoreConference Guest (uncredited) | Conference Guest (uncredited) |
| DDylan Keith AdamsDoctor at Conference and Event Dinner (uncredited) | Doctor at Conference and Event Dinner (uncredited) |
 Charles PoolePatient / Fisherman (uncredited) | Patient / Fisherman (uncredited) |
| JJohn W. HardenConference Guest / Paramedic (uncredited) | Conference Guest / Paramedic (uncredited) |
 Bryant BentleyParamedic (uncredited) | Paramedic (uncredited) |
| AAaron Pullins IVMedical Conference Attendee (uncredited) | Medical Conference Attendee (uncredited) |
 Joanne PopolinMedical Conference Attendee (uncredited) | Medical Conference Attendee (uncredited) |
 Carly TamborskiDoctor at Conference (uncredited) | Doctor at Conference (uncredited) |
| DDavid PittingerStudent's Dad (uncredited) | Student's Dad (uncredited) |
| MMichael Lee BaileyConference Guest (uncredited) | Conference Guest (uncredited) |
| JJohn NewsomDoctor at Banquet (uncredited) | Doctor at Banquet (uncredited) |
| RRobert GerdingVisiting Consultant (uncredited) | Visiting Consultant (uncredited) |
 William C. IngramJanitor (uncredited) | Janitor (uncredited) |
| BBeverly KristyDoctor (uncredited) | Doctor (uncredited) |
| DDerek PolenConference Guest (uncredited) | Conference Guest (uncredited) |
 John E. BrownleeCoastal Walker (uncredited) | Coastal Walker (uncredited) |
