Bernard Hepton (Mr Woodhouse) and Samantha Bond (Mrs Weston) previously played father and daughter, Sir Thomas and Maria Bertram, in another Jane Austen adaptation, Mansfield Park (1983).
The pale pink gown with cerise ruffle along the neckline worn by a guest at the Crown Ball is the same gown worn by Victoria Hamilton (Mrs.Forster) to the Bennet's farewell dinner for the militia in Pride and Prejudice (1995), by a ball guest in Mansfield Park (1999), by an extra attending the play at the asylum in Quills (2000), by an extra at the London ball where Lady Caroline Lamb dances the waltz in Byron (2003), and by a guest at the London ball in Sense & Sensibility (2008).
The dark velvet vest with four buttons down the front Kate Beckinsale (Emma Woodhouse) wears at the Hartfield party is the same costume worn by a guest at the Duchess of Richmond's Ball in Vanity Fair (1998), and by Julie Cox (Annabella Milbanke) during Christmas dinner in Byron (2003).
Alistair Petrie (Robert Martin) plays Mr Groff in Sex Education. Connor Swindells, who plays his son in Sex Education, portrays Robert Martin in the 2020 version of Emma.
The sprigged sheer yellow gown with white sleeves worn by Samantha Morton (Harriet Smith) at Randalls is the same costume previously worn in Pride and Prejudice (1995) by Lucy Davis (Maria Lucas) at Rosings Park. The costume is also worn by Emilia Fox (Clara Copperfield) in David Copperfield (1999).