Watch the Hilarious Trailer For Brittany Runs a Marathon, Which Is Based on a True Story

Ready to feel inspired? No? How about just a little bit? Because the trailer for Brittany Runs a Marathon proves that all it takes is one tiny moment to change your entire life.

In the first trailer for the comedy, which is based on a true story, Workaholics actress Jillian Bell stars as New Yorker Brittany Forgler, who is hilarious, outgoing, and always down to party. What she's not is healthy, and when her doctor challenges her to lose 55 pounds, she balks at the idea. Fortunately, with the help of her neighbor (Casual's Michaela Watkins), she laces up her sneakers and finds herself falling in love with running, to the point where she makes a goal of racing in the New York City Marathon.

Brittany Runs a Marathon also stars Utkarsh Ambudkar, Lil Rel Howery, and Micah Stock and sprints into theaters on Aug. 23.