When Graham decides to surprise his family by traveling home for Christmas, he is shocked to discover them already celebrating with an unexpected guest of honor, his ex-fiancée, Ali. The two exes battle it out to see who the family will pick to stay through Christmas Day and who must go.
| Actor | Role |
|---|---|
 Leighton MeesterAli | Ali |
 Robbie AmellGraham | Graham |
 Michael HitchcockDennis | Dennis |
 Kathryn GreenwoodJeannie | Jeannie |
 Veronika SlowikowskaMindy | Mindy |
 Steven HuyElliott | Elliott |
 Thomas CadrotBrady | Brady |
 Donna BenedictoJess | Jess |
 Daniel BaconMr. Tusk | Mr. Tusk |
| LLucas ChadwickFat Mike | Fat Mike |
 Emily SchoenQuinn | Quinn |
 Sofia Irene WorsleyLittle Girl | Little Girl |
| EEleanor WalkerElderly Churchgoer | Elderly Churchgoer |
 C.J. WilkinsUber Driver / Server | Uber Driver / Server |
| BBrittany HobsonMother | Mother |
 Dana StoutenburgYoung Doctor | Young Doctor |
 Spencer BorgesonRandy | Randy |
 Rachel RisenNeethal | Neethal |