 Ben StillerWalter Mitty | Walter Mitty |
 Kristen WiigCheryl Melhoff | Cheryl Melhoff |
 Sean PennSean O'Connell | Sean O'Connell |
 Shirley MacLaineEdna Mitty | Edna Mitty |
 Adam ScottTed Hendricks | Ted Hendricks |
 Kathryn HahnOdessa Mitty | Odessa Mitty |
 Patton OswaltTodd Maher | Todd Maher |
 Adrian MartinezHernando | Hernando |
 Ólafur Darri ÓlafssonHelicopter Pilot | Helicopter Pilot |
 Gunnar HelgasonHotel Keeper | Hotel Keeper |
 Terence Bernie HinesGary Mannheim | Gary Mannheim |
 Alex AnfangerTed's Toner Box Associate | Ted's Toner Box Associate |
 Gary WilmesWalter's Dad | Walter's Dad |
 Jon DalyTim Naughton | Tim Naughton |
 Gurdeep SinghCab Driver | Cab Driver |
 Paul FitzgeraldDon Proctor | Don Proctor |
 Grace RexCheryl's Co-Worker | Cheryl's Co-Worker |
 Amanda NaughtonFemale Editor | Female Editor |
| NNolan CarleyWestern Union Employee | Western Union Employee |
 Joey SlotnickRetirement Home Administrator | Retirement Home Administrator |
| MMarcus AntturiRich Melhoff | Rich Melhoff |
 Amy StillerRich's Friend's Mom | Rich's Friend's Mom |
| RRosamund GundmundsdottirTicket Agent | Ticket Agent |
 Stuart CornfeldGreeland Air Passenger | Greeland Air Passenger |
| MMaariu OlsenRental Car Agent | Rental Car Agent |
 Makka KleistBartender | Bartender |
 Þórhallur SigurðssonTrawler Captain | Trawler Captain |
| AAri MatthíassonTrawler 1st Mate | Trawler 1st Mate |
| HHendrikus SchravenTrawler 2nd Mate | Trawler 2nd Mate |
| FFinni JohannssonTrawler 3rd Mate | Trawler 3rd Mate |
