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.
Unfortunately the movie Brittany Runs a Marathon is not yet available on HBO Max.
| Directing | Paul Downs Colaizzo | Director |
| Production | Tobey Maguire | Producer |
| Production | Margot Hand | Producer |
| Production | Matthew Plouffe | Producer |
| Writing | Paul Downs Colaizzo | Writer |
| Production | Jillian Bell | Executive Producer |
| Art | Erin Magill | Production Design |
| Art | Naomi Munro | Art Direction |
| Production | Paul Downs Colaizzo | Executive Producer |
| Art | Kim Fischer | Set Decoration |
| Camera | Seamus Tierney | Director of Photography |
| Costume & Make-Up | Stacey Berman | Costume Designer |
| Editing | Casey Brooks | Editor |
| Sound | Duncan Thum | Original Music Composer |
| Production | Jolian Blevins | Co-Producer |
| Costume & Make-Up | Dennis Polanco | Hair Department Head |
| Production | Padraic 'Paddy' Murphy | Associate Producer |
| Production | Richard G. Weinberg | Executive Producer |
| Production | Maribeth Fox | Casting |
| Costume & Make-Up | Scott Hersh | Makeup Department Head |
| Visual Effects | Alex Noble | Visual Effects Supervisor |
| Art | Lindsay Stephen | Set Decoration Buyer |
| Sound | Ric Schnupp | Sound Re-Recording Mixer |
| Sound | Ric Schnupp | Supervising Sound Editor |
| Production | Laura Rosenthal | Casting |
| Directing | Thomas Fatone | First Assistant Director |
| Directing | Kim Thompson | Second Assistant Director |
| Production | Jolian Blevins | Unit Production Manager |
