Trivia: Nanny McPhee
- Fake Brit: Maggie Gyllenhall proudly takes her place on the list of "American actors who can actually do a convincing English accent".
- Hey, It's That Guy!:
- A few Harry Potter actors star in these movie, including Imelda Staunton (Dolores Umbridge) as The Chef, Kelly MacDonald (The Grey Lady/Helena Ravenclaw), Dame Maggie Smith (Professor McGonagall), Rhys Ifans (Xenophilius Lovegood) and Ralph Fiennes (Voldemort) in the sequel, and Emma Thompson (Professor Trelawney) as the eponymous nanny.
- Hey, it's that kid from Love Actually! Otherwise known as Ferb Fletcher.
- Angela Lansbury is English? Actually, yes, although she's lived in America since she was 15.
- Maggie Gyllenhaal, Rhys Ifans and Ewan MacGregor in the sequel.
- It's Mordred from the BBC's Merlin in the sequel!
- Mr. Darcy/Bertie is raising a family all on his own. And he was about to marry Auntie Una!
- Retroactive Recognition: Kelly MacDonald as Evangeline in the first movie.