In 2010, Bell made her writing and directing début with the short film "Worst Enemy", which starred Michaela Watkins, Matt Walsh and Lindsay Sloane. Her film débuted at the 2011 Sundance Film Festival and has also played at the Nantucket Film Festival, the Dallas International Film Festival, the Gen Art Film Festival and Aspen Shortsfest, winning the Tony Cox Award for Screenwriting in a Short Film from Nantucket and receiving a Shorts Jury Special Mention from Dallas. Her film led to her being named one of the "2012 Inspiring Filmmakers" by LUNAFEST.