Mr. Brown (Colin Firth) struggles to control his children when he hears a knock at the door and the mysterious Nanny McPhee (Emma Thompson) arrives to deal with them. #NannyMcPhee #EmmaThompson #ColinFirth Get your Family Movie Pick! Watch Nanny McPhee here: Widower Cedric Brown hires Nanny McPhee to care for his seven rambunctious children, who have chased away all previous nannies. Taunted by Simon and his siblings, Nanny McPhee uses mystical powers to instill discipline.