by Lynn Lee

A surprise breakout and audience favorite at Sundance earlier this year, Brittany Runs a Marathon now faces a challenge nearly as daunting as that of the title character’s – namely, overcoming the late summer movie doldrums and getting the attention of potential viewers who are already turning their thoughts to school, football, Oscar contenders, and other harbingers of fall.  Can this tiny indie picture – with a newbie director and no big names attached – become the sleeper hit it’s clearly angling to be through word of mouth and savvy social media marketing?  Having seen the movie, which I found quite charming if predictable and a bit lightweight, I’ll volunteer a cautious “maybe.”

Brittany’s chief assets are a winning star turn from Jillian Bell (most familiar to mainstream audiences as the acerbic scene-stealer of 22 Jump Street), who moves confidently from comic sidekick to funny Everywoman lead, and a narrative arc that’s just as humorous and relatable...