Most of Jennifer Coolidge (Miss Elizabeth Charming's) lines were made up on the spot; according to the producers, it was almost impossible to get her to memorize the script.
Mrs. Wattlebrooks' personal maid is played by Jane Seymour's real life sister.
In the croquet scene Jane and Mr. Andrews are talking and he says, "You can tell by the way he uses his chalk, he's a ladies man. No time for that sort of conversation." Clearly a play on the song by the Bee Gees, "Staying Alive".
Rupert Vansittart, who plays Mr. Wattlesbrook, was also in the BBC mini-series of Pride & Prejudice, which Jane is obsessed with and watches in the movie. He also plays a surly, usually drunk upper class gentleman.
JJ Field (Henry Nobley) actually played the romantic lead of Mr. Tilney in an ITV production of Jane Austen's Northanger Abbey in 2007.
Shannon Hale: The author who wrote the novel on which the film is based, has a cameo as an extra within the film. According to Hale, she chose not to tell the other extras who she was and they were all very impressed that the director and lead actors addressed her throughout the day of shooting.