Brittany Runs a Marathon
- Taon: 2019
- Bansa: United States of America
- Genre: Comedy, Drama
- Studio: Material Pictures, Picture Films
- Keyword: new york city, philadelphia, pennsylvania, roommate, brother-in-law, dogsitter, based on true story, overweight woman, neighbor, drinking, exercise, weight loss, online dating, struggles, insecure woman, housesitting, single woman, judgemental, partying, doctor's visit, frustration, running, embarrassed, relatable, wake up call, nyc marathon
- Direktor: Paul Downs Colaizzo
- Cast: Jillian Bell, Michaela Watkins, Utkarsh Ambudkar, Lil Rel Howery, Micah Stock, Alice Lee