* AllStarCast: The 2007 film has several accomplished British talents - Eileen Atkins, Victoria Wood, Harriet Walter, Emilia Fox, Richard Griffiths - in addition to then-rising stars Emma Watson and Lucy Boynton (who are much better known these days).
* AscendedFanon: It was a fan theory that Dr Jakes and Dr Smith were a lesbian couple in the book. Heidi Thomas - who is a fan of the book - incorporates a few hints towards this theory in the 2007 film.
* DyeingForYourArt:
** Emma Watson is naturally light brown but went blonde for Pauline. As a result, Hermione Granger is also blonde in the fifth ''Harry Potter'' film.
** Lucy Boynton is brunette but becomes a redhead to play Posy.
** Marc Warren is a natural blond but is brunet as Mr Simpson.
* FakeAmerican: Mr Sholsky is played by the British Adrian Lester.
* FakeBrit: Downplayed. Lucy Boynton was born in America but moved to England when she was five, and so did not have to fake an accent as Posy.
* FakeRussian: The British Dame Eileen Atkins plays Madame Fidolia.
* IronyAsSheIsCast: Petrova is a poor dancer and singer, and merely competent at acting. Her actress Yasmin Paige has a musical theatre background, and even played Cosette in ''Theatre/LesMiserables''.
* PlayingAgainstType: Even after finishing with ''Film/HarryPotter'', Emma Watson has drifted towards playing BrainyBrunette or more down-to-earth characters. Pauline is the more traditionally feminine of the sisters; Petrova would be more Emma's usual type.
* PromotedFanboy: Both Heidi Thomas and actress Victoria Wood (Nana) were huge fans of the original book.
* RealLifeRelative: Emma Watson's younger half sisters take turns playing the young Pauline in earlier scenes.
* ReferencedBy: The film ''Film/YouveGotMail'' features [[https://www.youtube.com/watch?v=ps2CGU-JZw0 a scene]] where Meg Ryan's character is in a Barnes and Noble-analog and overhears a customer asking about the series. She gushes about it for a minute, her favorite is ''Ballet Shoes''.
* TalentDouble: Lucy Boynton had a double for most of Posy's dance scenes.