In the book, Bridget Jones is obsessed by the actor Colin Firth from the BBC TV series Pride and Prejudice (1995), and even gets to meet him for an interview. This plot-line is omitted from the film, where Firth actually plays her love interest Mark Darcy. They did, however, film the interview scene with Colin dressed in his street clothes, and Renée Zellweger in character. The scene is included in the DVD extras.
During an appearance on Oprah, Hugh Grant and Colin Firth revealed the scene of them fighting each other was not choreographed.
The role of Daniel Cleaver (Hugh Grant) only had a very small appearance in the book. The character was so memorable and popular that his part was extended specifically for the movie.
During the filming in Thailand, the cast stayed on Nai Yang Beach, close to the airport in Phuket. They often drank at the little shack bars down on the beach, especially 'Mama Mia's'. In 2004, all of those bars and restaurants were destroyed in the Tsunami. The pianist at the JW Marriott in Phuket, Stuart Hopkins, who was also a regular at the bar made extensive attempts to contact the cast. In June 2005, a large package arrived for his attention. It was from Renée Zellweger containing many things such as T-shirts, caps, and a big movie poster signed by herself and other cast members. Over the years the bars on the beach were re-built, and the poster still hangs proudly in Mama Mia's bar as of August 2009.
Bridget makes a comment about Mark wearing a wet shirt. Colin Firth made a famous scene playing Mr Darcy in Pride and Prejudice (1995) where he appeared to Elizabeth Bennet in a wet shirt after swimming in a lake.
Drug smuggling is a very serious offense in Thailand, even more serious than murder. The rationale is that a murder might result in one death where drugs kill hundreds.
All of the characters who appeared in the first Bridget Jones movie Bridget Jones's Diary (2001) and who reappeared in this one were played by the same actor or actress with the exception of Mrs. Darcy who was played by Shirley Dixon replacing the late Charmian May who sadly passed away after the release of the first movie and before the making of the second movie commenced; and Magda, who was played by Claire Skinner in the first film, and is played by Jessica Hynes in this film.
With a budget of $40 million, this is the most expensive film in the 'Bridget Jones' trilogy.
The poem Daniel quotes to Bridget on the boat while in Thailand is a translation of the famous "Phra Aphai Manee", a famous epic poem about a hero/ prince who, among other things, wooes and marries many princesses. The part he quotes is when Phra Aphai Manee wooes his head wife, Suwan Malee.
Earned $8.7 million in its 530-theater opening weekend, setting the record of the highest-grossing limited release opening weekend. This record was broken seven years later by Mission: Impossible - Ghost Protocol (2011), which earned $12.8 million in its 425-theater debut.
The book that Jed and Shazzer read on the plane is "The Beach" by Alex Garland that also partially takes place in Thailand.
The producers originally asked Bridget Jones's Diary (2001) director Sharon Maguire to return for this film, but she told them that she had no interest whatsoever in directing it. Renée Zellweger's personal choice for director was Nigel Cole, but the producers agreed that a woman should direct, and hired Beeban Kidron instead. Maguire would return as director for the second sequel, Bridget Jones's Baby (2016), though.
BBC newscaster and presenter of University Challenge Jeremy Paxman makes a short cameo appearance (greeting Hugh Grant's character Daniel Cleaver in passing and complimenting him on his show) in a scene that was filmed in one continuous shot, which required numerous retakes and took a long time to do. He commented that he usually covered the entire world news in the time it took to film this short sequence for a film.
Giles Benwick, whom Bridget meets at the law council dinner, shares his last name with a character from Jane Austen's "Persuasion".
Janey Osbourne is played in this film by Lucy Robinson, who, as Louisa Hurst, one of Charles Bingley's sisters, co-starred with Colin Firth (as Fitzwilliam Darcy) in the 1995 version of Pride and Prejudice, based on the book of the same name by Jane Austen. The Bridget Jones books and films are modernized versions of the same book by Austen.