First time I saw Jillian Bell was in Workaholics, a short episodes comedy series, a show where she showed she had a funny bone. So I was expecting the same level of hilarious moments in Brittany Runs A Marathon as this time Jillian Bell has the leading role. Her character, a bit chubby, is trying to change her way of life with the ultimate goal to be able to finish a marathon. I didn't laugh as much as I was expecting so for that I'm a bit disappointed but overall it's not a bad movie, it's just not a hilarious comedy.