Hilarious and outgoing, Brittany Forgler, is everybody’s best friend ― except her own. Her partying, underemployment and toxic relationships are catching up with her. She receives a startling wake-up call when a visit to the doctor reveals how unhealthy she is. Motivated to lose weight, but too broke for a gym and too proud to ask for help, Brit is at a loss, until her neighbor pushes her to run one sweaty block. Soon, she sets an almost unthinkable goal: the New York City Marathon.

Jillian Bell
as Brittany Forgler

Michaela Watkins
as Catherine

Utkarsh Ambudkar
as Jern Dahn

Lil Rel Howery
as Demetrius

Micah Stock
as Seth

Alice Lee
as Gretchen

Patch Darragh
as Doctor Falloway

Peter Vack
as Ryan

Kate Arrington
as CiCi Forgler

Juri Henley-Cohn
as David
SWITCH.
While ‘Brittany Runs a Marathon’ is about weight loss, it never feels pandering or forced. Instead, it comes across as extremely realistic and grounded, which allows the comedy to flow. Everyone across the board brings their A-game to bring this really fresh and heartwarming comedy to life. If you’r...
Rodney Wollam
Brittany gets it right - that feeling you have in the pit of your stomach when you push away everyone who cares about you. A feeling I've had for a long long time. So self destructive. A 5-star movie, reflecting the reality of life, wouldn't have a happy ending. This movie has one. But the first ...