Random Trivia For This Title:
- In the novel, Fili and Kili died to protect Thorin Oakenshield. In the film they die for different reasons: Fili is murdered in battle by Azog and Kili is killed trying to save Tauriel while Thorin is actually trying to protect them.
- In the novel, the Master of Lake-town made a getaway with whatever gold he could carry. He gets killed in the film, so that fate goes to Alfrid.
- In the theatrical version, Bombur does not get to say a single word, but he does get to blow a horn. (He does however have one line in the extended edition [hands Bifur the axe that had been dislodged from his head] "Here you go cousin." )
- Several cast members kept props from the film when shooting wrapped. Martin Freeman kept his sword and prosthetic ears, while Richard Armitage kept the original Orcrist-sword. Finally, Lee Pace kept his elven-sword, which he keeps in his umbrella stand.
- The elk that Thranduil rides on is played by a horse, named Moose.
- When the movie was promoted with a panel at San Diego Comic Con, several fans camped outside hall the day before the panel, in order to get seats. In the middle of the night, the fans were woken up by cast members Lee Pace and Andy Serkis who greeted the waiting fans and delivered autographs and photos for hours. In the end, Pace passed out from exhaustion and shared a mattress with a fan.
- This film has the shortest running time of any Middle-earth movie directed by Peter Jackson, running at 2 hours and 24 minutes. (2 hours and 44 minutes in the extended edition)
- This is the first "Middle-Earth" film in the franchise in which the extended edition received an R rating by the MPAA. It is also the first extended edition with the second least amount of new footage (20 minutes), the film with the least amount of new footage is The Hobbit: An Unexpected Journey (13 minutes).
- Despite playing his father in the trilogy, Lee Pace (Thranduil) is more than two years younger than Orlando Bloom (Legolas). Bloom is 38 whereas Pace is only 35.
- The oak tree on the hill over Bag End is from the acorn Bilbo gathered from Beorn's garden, which is the one he shows to Thorin; for him to remember his adventure.
- Lee Pace's parents visited him on set and subsequently Peter Jackson offered them to be extras in the film. They were given roles as Laketown villagers and filmed a scene with Ian McKellen. However, according to Pace, they were cut out of the film, because his father was "hamming it up" during his scene.
- Billy Boyd, who played Pippin in the Lord of the Rings trilogy, co-wrote and performed the song "The Last Goodbye" for the end credits of this film.
- Cameo: Dominic Monaghan: "Merry" from the Lord of the Rings trilogy, can be briefly seen during the auction scene.
- The five armies in the movie are: The Dwarves, the Elves, the men of Laketown, the Eagles, and the Orcs led by Bolg under the command of Azog. In the book, the Five Armies are the Elves, the Men of Laketown, Dwarves and Eagles for the good side, and the Orcs
- Both Ian Holm and Christopher Lee filmed their scenes at London's Pinewood Studios because health concerns left them uncomfortable with flying to New Zealand.
- As of 2014, Cate Blanchett and Orlando Bloom are the only major Elf actors not to appear in a Marvel film: