* FakeBrit: Maggie Gyllenhall proudly takes her place on the list of "American actors who can actually do a convincing English accent".
* HeyItsThatGuy:
** A few ''Film/HarryPotter'' 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 [[spoiler:Ralph Fiennes (Voldemort)]] in the sequel, and Emma Thompson (Professor Trelawney) as the eponymous nanny.
** Hey, it's that kid from ''LoveActually''! Otherwise known as [[WesternAnimation/PhineasAndFerb Ferb Fletcher]].
** Creator/AngelaLansbury is English? Actually, yes, although she's lived in America since she was 15.
** MaggieGyllenhaal, [[LittleNicky Rhys Ifans]] and [[spoiler:Ewan [=MacGregor=]]] in the sequel.
** It's Mordred from the BBC's ''{{Series/Merlin}}'' in the sequel!
** [[Literature/BridgetJones Mr. Darcy]]/Bertie is raising a family all on his own. And he was about to marry Auntie Una!
* RetroactiveRecognition: Kelly [=MacDonald=] as Evangeline in the first movie.
* WhatCouldHaveBeen: On the commentary, it's mentioned that the baby originally was supposed to be bouncing in the pot as it got hotter and hotter. They scrapped that when they realized that would be a little ''too'' disturbing.
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