The Templeton brothers have become adults and drifted away from each other, but a new boss baby with a cutting-edge approach is about to bring them together again - and inspire a new family business. Director Tom McGrath Writers Michael McCullers(screenplay by)Tom McGrath(story by)Marla Frazee(based on the books by) Stars Alec Baldwin(voice)James Marsden(voice)Amy Sedaris(voice)