The pair joins Ben Affleck, Kevin Costner and Tommy Lee Jones in the independently financed drama that John Wells wrote and is directing.
The pic is getting under way in Boston.
Story concerns the impact that a corporate downsizing has on its casualties and survivors. Bello will play the veep of human resources, who is forced to fire the character played by Affleck. Nelson plays the CEO of the global conglomerate.
Wells, Claire Rudnick Polstein and Paula Weinstein are producing, and Barbara Hall is exec producer.
Bello most recently starred in “The Mummy: Tomb of the Dragon Emperor” and will next star in the Rebecca Miller-directed “The Private Lives of Pippa Lee.” Last seen in “Blades of Glory,” Nelson most recently wrapped the Sandra Bullock-Ryan Reynolds comedy “The Proposal.”