Melissa McCarthy and Ben Falcone’s upcoming film Michelle Darnell is rounding out its cast. THR reports that Kristen Bell has just been added to the cast, which also includes Kathy Bates and Peter Dinklage. Based on one of McCarthy’s original characters at The Groundlings, Michelle Darnell will follow McCarthy as “a titan of industry who is sent to prison after she’s caught insider trading. When she emerges ready to re-brand herself as America’s latest sweetheart with the help of a former assistant, not everyone she screwed over is so quick to forgive and forget.†Bell will play the former assistant – a “mousy single mother who is trying to start a cupcake business.†Bates will play McCarthy’s “tough, wealthy and eccentric mentor†while Dinklage’s role is being kept under wraps, though he’ll serve as the antagonist to McCarthy’s character.