Lucy has always used food to escape life's problems, but when this self-titled "fat friend" lures her group of old college buddies to the Montana wilderness, she reveals a new self - skinny, beautiful and still flawed.
| Actor | Role |
|---|---|
 Missi PyleLucy | Lucy |
 Melissa McCarthyBecky | Becky |
 Josh HopkinsGeorge | George |
 Octavia SpencerMary | Mary |
 Jack NoseworthyTrevor | Trevor |
 Larry SullivanAustin | Austin |
 Allison JanneySuzanna | Suzanna |
 Phill LewisRaye | Raye |
 William SandersonSam | Sam |
 Allison MackieBitter Flight Attendant | Bitter Flight Attendant |
| AAmy LandersPuffy Paint Flight Attendant | Puffy Paint Flight Attendant |
 Ben FalconeCoach Merryweather | Coach Merryweather |
 Tate TaylorGeorge's Boyfriend | George's Boyfriend |
| PPhilip LittellRichard | Richard |
| SStacy YutucFlirty Flight Attendant | Flirty Flight Attendant |
 Drew MatthewsBoy | Boy |
| SSean DalyPark Ranger | Park Ranger |
| BBrutusBear | Bear |
 Wyatt EarpAirport Announcer (voice) | Airport Announcer (voice) |