Watch Nanny McPhee Streaming Now on Peacock. Synopsis: Nanny McPhee (Emma Thompson), a woman with a magical and unsettling appearance, enters the home of the recently widowed Mr. Brown (Colin Firth) to tame his seven wildly misbehaving children; she quickly succeeds where 17 others failed by ensuring that their vile behavior leads directly to startling, magical consequences. Starring Emma Thompson, Colin Firth, Kelly Macdonald, Derek Jacobi, Celia Imrie, Patrick Barlow, Imelda Staunton, Thomas Brodie-Sangster, Angela Lansbury #Peacock #NannyMcPhee #ColinFirth #ThomasBrodieSangster #EmmaThompson #Shorts Peacock is your go-to for hit movies, TV, live sports, and more. With the streaming service from NBCUniversal, you can watch new movies from theaters, current hits from NBC and Bravo, nonstop action from WWE, Premier League, Big Ten, and tons of other sports. Plus, stream exclusive Originals, NBC News, and your faves like The Office, Suits, Modern Family, and Yellowstone. Peacock is ...