Quite a few of the costumes in the 2007 version of ‘Mansfield Park’ have been reused from other productions. Here is a list I’ve collected from Imdb.com and RecycledMovieCostumes.com:
The dark patterned muslin gown worn by Fanny Price at Maria’s wedding is the same gown Mrs. Dashwood (Gemma Jones) wears when Edward comes to Barton Cottage in ‘Sense and Sensibility’ (1995) when Edward comes to Barton Cottage, Miss Briggs (Janet Dale) wears at Park Lane in ‘Vanity Fair’ (1998), Mrs. Curtain (Pauline Moran) wears when Byron arrives for the wedding in ‘Byron’ (2003), and an wears extra at the Meryton Assembly Ball in ‘Pride & Prejudice’ (2005).
The windowpane check gown worn by Fanny Price to cut lavender is the same gown worn by Elinor Dashwood (Emma Thompson) in ‘Sense and Sensibility’ (1995), Alice Cottisloe (Honeysuckle Weeks) in ‘Victoria Wood with All the Trimmings’ (‘Plots and Proposals’, 2000), an extra at the London party where Byron meets Annabella Milbanke in ‘Byron’ (2003), Victoria Hopkins in ‘The Regency House Party’ (2004), Henrietta Musgrove (Rosamund Stephen) in ‘Persuasion’ (2007), and Isabella Linton (Nicola Burley) in ‘Wuthering Heights’ (2011).
The gown of patterned gray muslin worn by Fanny during the play rehearsal scene is the same gown worn by Sally Hemings (Thandie Newton) in ‘Jefferson in Paris’ (1995) and by Sarah (Jessica Oyelowo) in ‘Sleepy Hollow’ (1999).
The white muslin dress with yellow overdress Maria wears during the scene in which Sir Thomas asks her if she still wants to marry Mr. Rushworth is the same gown Marianne Dashwood (Kate Winslet) wears in ‘Sense and Sensibility’ (1995) and a farmhouse servant wears in ‘Eroica’ (2003).
In the play rehearsal scene, Tom Bertram wears a brocade suit that was also worn by Sir Walter Elliot (Corin Redgrave) in ‘Persuasion’ (1995) in which he tries to induce Anne to accompany him to Lady Dalrymple’s.
The cream gown with red trim Mary Crawford wears to the picnic is the same costume Becky Sharp (Natasha Little) wears at the Sedley’s house in ‘Vanity Fair’ (1998) and Cesca Martin wears in ‘The Regency House Party’ (2004).
The tan and black striped gown with a black crepe bow on the bodice worn by Lady Bertram in the final scene is the same gown worn by Mrs. Dashwood (Gemma Jones) to play cards at Barton Park in ‘Sense and Sensibility’ (1995), by Mrs. Lefroy (Wendy Craig) in ‘The Real Jane Austen’ (2002), by Lady Judith Milbanke (Penny Downie) at dinner, after Annabella returns to her parents’ house in ‘Byron’ (2003), by Rosemary Enright to dinner in ‘The Regency House Party’ (2004), by an extra at the Netherfield Ball in ‘Pride & Prejudice’ (2005), and by Lady Ludlow (Francesca Annis) in ‘Cranford’ (2007).
The red print gown worn by Mary Crawford has the distinction of being used in two versions of Mansfield Park, being also worn by Mrs. Norris (Sheila Gish) while Fanny reads the newspaper aloud in ‘Mansfield Park’ (1999), It is also worn by Lady Russell (Susan Fleetwood) at the party at Camden Place in ‘Persuasion’ (1995), Catherine Bigg (played by ?) in ‘The Real Jane Austen’ (2002), a guest at a London ball in ‘Byron’ (2003), Elizabeth Devonport to dinner in ‘The Regency House Party’ (2004), Anne Steele (Daisy Haggard) to dinner in London in ‘Sense & Sensibility’ (2008), and Mrs. Bennet (Alex Kingston) in ‘Lost in Austen’ (2008).
The coat worn by Fanny to cut lavender was worn by Marianne Dashwood (Kate Winslet) in ‘Sense and Sensibility’ (1995), Francesca Martin in ‘Regency House Party’ (2004), and Harriet Smith (Louise Dylan) in ‘Emma’ (2009). (I’m not actually quite sure this is the same coat.)
The waistcoat worn by Henry Crawford to Maria’s wedding was afterwards worn by Giles Goren in ‘Supersizers Go: Regency’ (2008) and by Mr. Knightley (Johnny Lee Miller) in ‘Emma’ (2009).
A dress worn by Mrs. Norris when discussing young Fanny’s arrival was also worn by Maggie Jacobs (Ashley Jenson) in ‘Extras: Ross Kemp’ (2005) and by Mrs. Bates (Vallerie Lilley) in ‘Emma’ (2009).
Mary Crawford’s riding costume is also worn by an extra in ‘Poldark’ (1996), Maria Oldknow (Carice Van Houten) in ‘From Time to Time’ (2009), and Tib Norcliffe (Susan Lynch) in ‘The Secret Diaries of Miss Anne Lister’ (2010).
The traveling outfit Maria wears after her wedding was also worn by Mary, Third Duchess of Richmond (Carmen Du Sautoy) in ‘Aristocrats’ (1999), an extra in ‘The Golden Bowl’ (2000), an “extra” (Katherine Parkinson) in ‘Extras: Ross Kemp’ (2005), and Lady Sarah (Lyndsey Marshal) in ‘Garrow’s Law’ (2009).
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Disclaimer: I have not seen, nor do I recommend, all of the movies mentioned in this post.