Emma Thompson has recounted how during the scene where Colonel Brandon, on horseback, approaches Elinor and Marianne in the out-of-doors, many takes were ruined by the horse surrendering to a bout of flatulence. Eventually, they were forced to shoot the scene with the farting horse as the flatulence would not abate, and the rather loud reports later were edited out of the soundtrack.
Whilst working on the script, Emma Thompson's computer developed a problem and she was unable to locate the file. She took the computer to Stephen Fry who, after seven hours, finally managed to retrieve the script.
The Dashwoods moved to their humble cottage when the weather was cold and the sheep still had their long, winter coats. The scenes were in fact filmed in late May, and in one take a sheep keeled over from heat exhaustion. So the sheep were immediately sheared and later appear with their haircuts, despite the wintry setting.
There is an ironic twist surrounding the casting of Kate Winslet, Emma Thompson and Greg Wise. Although they portray love interests on screen, Kate Winslet and Greg Wise only dated briefly in reality before Greg took to Winslet's on-screen sister Emma Thompson. Thompson and Wise were together for 8 years before getting married. Together they have one adopted son and one biological daughter. Interestingly, Richard Lumsden who portrays Thompson's on-screen brother-in-law Robert Ferrars, is her brother-in-law in real life. Lumsden is married to Emma's younger sister Sophie Thompson who was also featured in a movie adaptation of Jane Austen's "Persuasion." Sophie Thompson portrayed the younger sister of the story's main character Anne Elliot, who was portrayed by Amanda Root who ironically enough was sought for the role of Marianne in "Sense & Sensibility." Root however, could not appear due to her obligations to film "Persuasion." (In a nutshell, Amanda Root landed a role in a Jane Austen adaptation and was coincidentally asked to star in another one. When she could not appear, another actress who dated the future husband of her on-screen sister's sister was given the role, and her on-screen sister's real life husband portrayed the on-screen brother-in-law of his real life sister-in-law in the same film that she could not star in.)
In 2010, during an interview on the show "One's Tonight with Jonathan Ross", Emma Thompson said that when he first arrived on the set, Greg Wise actually pursued a romantic relationship with then-19-year-old Kate Winslet, instead of with Thompson. After filming ended, Thompson and Wise did start dating, and they eventually had a baby and got married.
In her book "The Sense and Sensibility (1995) Screenplay & Diaries: Bringing Jane Austen's Novel to Film", Emma Thompson writes that after a particularly difficult day filming a sequence that involved a flock of sheep, Ang Lee swore that he would never again use the animals on a movie set. Ten years later, however, Ang Lee went on to direct (and win a directing Oscar for) Brokeback Mountain (2005), which is about two men who meet while sheep herding.
In the DVD extras, Emma Thompson relates how Patrick Doyle was challenged to set Ben Jonson's 'The Dreame' to music. The result is the piece Col. Brandon requests Marianne to play on the pianoforte and the end title music.
The excerpt that Colonel Brandon reads to Marianne near the end of the film ("nothing's lost but may be found if sought...") belongs to Edmund Spenser's epic poem 'The Faerie Queene' (1590). It is part of the second canto in Book V: Justice.
Amanda Root was originally sought for the role of Marianne, and performed the role at a read-through of an early draft of the script. However, by the time the film was being made, Root could not appear, as she was already working on another Jane Austen film, Persuasion (1995).
The apple-green day dress Harriet Walter (Fanny Dashwood) wears trimming hats with Lucy Steele is the same costume worn by Henry's new partner (seated next to Mary's new partner) at the end of Mansfield Park (1999).
The wine-colored muslin dress, beige pelisse and matching bonnet Kate Winslet (Marianne Dashwood) wears for the Dashwoods' arrival at Barton Cottage is the same costume Cesca Martin wears for her arrival at Regency House in The Regency House Party (2004). The dress is also worn by an extra at the Meryton Assembly Ball in Pride & Prejudice (2005).
The tall green military-style hat with a peacock feather worn by an extra at the Covent Garden coffee shop is the same one worn by Christina Cole (Caroline Bingley) at Pemberley during the shooting contest in Lost in Austen (2008).
The white muslin dress with yellow overdress Kate Winslet (Marianne Dashwood) wears during the picnic scene is the same costume a farmhouse servant wears in Eroica (2003), and Michelle Ryan wears during the scene in which Sir Thomas asks Maria if she wants to marry Mr. Rushworth in Mansfield Park (2007).
The pale blue dress with checked trim on the sleeves Emma Thompson (Elinor Dashwood) wears at Barton Cottage is the same costume Anna Madeley (Lucy Steele) wears when Edward calls at Mrs. Jennings' London house in Sense & Sensibility (2008), and by a guest at the Meryton Assembly ball in Pride & Prejudice (2005).
The dark purple velvet and silk gown Harriet Walter (Fanny Dashwood) wears to dinner at Norland Park is the same costume worn by the theatre guest seated next to deSade's wife in Quills (2000), and by Jane How (Lady Holland) at the London party in Byron (2003).
The trivia items below may give away important plot points.
Originally, there was to be a scene in which Hugh Grant would kiss Emma Thompson. This scene was deleted, however, because the film was too long already and the scene was felt to be inappropriate for Austen's time. They deleted another scene between Elinor and Mrs. Dashwood because of the length and the belief that it was not necessary for the exposition.