When a medical emergency pulls the Goss family apart, determined dog Winstead will do all he can to bring his humans back together before Christmas Eve.
| Actor | Role |
|---|---|
 Dennis QuaidSander | Sander |
 Milo VentimigliaHunter | Hunter |
 Brooke Lena JohnsonEllo | Ello |
 Kathleen Rose PerkinsJuliana | Juliana |
 Jennifer TillyLucille | Lucille |
 Thomas Haden ChurchWinstead (voice) | Winstead (voice) |
 Mary SteenburgenClaire | Claire |
 Ethan LoomisSean | Sean |
 Marissa Jaret WinokurNurse Miller | Nurse Miller |
 Cathryn MichonMrs. O'Brien | Mrs. O'Brien |
| WW. Bruce CameronPeter Altbef | Peter Altbef |
 Karen LeBlancAllison | Allison |
 Rebecca StaabBarbara | Barbara |
| AAbel NeudorfGarrett | Garrett |
| OOskar NeudorfGarrett | Garrett |
| AAusten SeddonEwan | Ewan |
| CCarter SeddonEwan | Ewan |
 Lucia MorrisBrittne | Brittne |
 Princess DavisSuffea | Suffea |
 Theresa WongDr. Lombard | Dr. Lombard |
 Filip FufezanDanny | Danny |
 Lisa ChandlerSabrina | Sabrina |
 Zak SantiagoDr. Lopez | Dr. Lopez |
 David JacoxAngry Man | Angry Man |
| AAngela ChuKim | Kim |
 Dean RedmanPrincipal Washington | Principal Washington |
| KKenneth WyseMr. Molitor | Mr. Molitor |
| DDenzel BrooksSteve | Steve |
| GGreta GloagYoung Ello | Young Ello |
| SSadie HatchRuby (voice) | Ruby (voice) |