Paul Giamatti John Adams Actor Laura Linney Abigail Adams Actor Stephen Dillane Thomas Jefferson Actor Danny Huston Samuel Adams Actor Tom Wilkinson Benjamin Franklin Actor Sarah Polley Abigail Adams Smith Actor David Morse George Washington Actor Tom Hollander King George III Guest Star John Dossett Benjamin Rush Guest Star Judith Magre Madame Helvétius Guest Star Ebon Moss-Bachrach John Quincy Adams Guest Star Samuel Barnett Thomas Adams Guest Star Andrew Scott Colonel William Smith Guest Star Kevin Trainor Charles Adams Guest Star Tom Hooper Director Tom Hanks Executive Producer Gary Goetzman Executive Producer Kirk Ellis Executive Producer Frank Doelger Producer David Coatsworth Producer