Brittany Runs a Marathon (out Oct 31) is as straight forward as a movie title gets. This is a film about a person named Brittany who runs a marathon. There's a lot more to it, however. Headlined by a terrific performance from star Jillian Bell, it's also the tale of a troubled woman addicted to self-pity and a continual “woe is me” attitude. A really interesting character. Grade: A-.