With a budget of $217 million dollars, the most expensive Transformers at the time of release.
The scenes of Sir Edmund Burton visiting 10 Downing Street were filmed at the actual office of the British Prime Minister in October 2016.
Mark Wahlberg announced this will be his last Transformers movie as Cade Yeager. He had signed a contract for three films, with the knowledge that he could be relieved earlier.
Director Michael Bay is a noted dog lover, and he cast Freya, a British dog with epilepsy that many homes had rejected, in the film.
Writer Matt Holloway is a fan of the drama Downton Abbey (2010), and jokingly said that Jim Carter (who plays the butler Mr. Carson in the show) should voice Cogman. He was shocked when Michael Bay got Carter signed on as Cogman.
Michael Bay said that this will be the last Transformers film he will direct, for the moment. He is open to doing more films in the future, if he gets a good story.
After the release of Transformers: Age of Extinction (2014), a writers' room was set up to plan the franchise's future beyond the main film series. Two of the ideas pitched involved the Arthurian myth and World War II respectively. Michael Bay liked them so much that he decided to incorporate them into the script for this film.
Tyrese Gibson was set to return as Robert Epps, but he was unable to appear in the film due to scheduling conflicts with The Fate of the Furious (2017).
Hot Rod is the second Lamborghini Transformer to appear after Lockdown in Transformers: Age of Extinction (2014). Generally, each Transformer in these films has a unique vehicle mode.
Blenheim Palace was decorated as a Nazi headquarters for the World War II scenes. This caused controversy among British war veterans, who protested that the palace was the former residence of war hero Winston Churchill, and did not deserve such treatment. Michael Bay explained that this was part of the film, and Churchill's grandson Sir Nicholas Soames lambasted the British press for sensationalizing a mere film scene.
Steve Buscemi voiced Daytrader in this film. Michael Bay had wanted Steve Buscemi to play Agent Simmons in Transformers (2007), but he was unavailable.
Quintessa's design is based on Alpha Q's design in Transformers: Energon (2004) (a humanoid upper body with tentacles for legs), and the Quintesson's facial designs in The Transformers (1984) (a face with a headdress). The headdress incorporates elements of the Autobot and Decepticon insignias, reflecting her role as the Transformers creator.
The first Michael Bay film to be shown in the 1.85:1 aspect ratio since his debut film Bad Boys (1995).
Onslaught's original alternate mode in The Transformers (1984) was an anti-aircraft truck, but this was revised to a Western Star tow truck. His green color is an homage to the Autobot Tow-Line in Transformers: Robots in Disguise (2000), who was a green tow truck.
Shia LaBeouf and Nicola Peltz appeared in this film, although it was only their portraits.
This is the second Hollywood movie to be shot in Cuba after The Fate of the Furious (2017). Tyrese Gibson played a major role in the first three Transformers movies and in The Fast and the Furious franchise.
While shooting in England, Mark Wahlberg spent time at St. Aidan's Church incognito, and made donations. No one knew anything until afterwards. Reverend Father Des McGiven said, "It's great that we had him in for the service, and we appreciate his generosity towards our church."
Liam Garrigan (King Arthur) also played the character King Arthur in the television series Once Upon a Time (2011).
Michael Bay originally wanted to pass on directing this film, but was persuaded to do one more by Peter Cullen.
This film features the myth of King Arthur. Michael Bay was previously going to direct King Arthur (2004), and had worked on that film for five years, before leaving it, due to budget issues.
Part of the film was shot at Stonehenge. Michael Bay requested to shoot an explosion on the location, but was denied, so he had a set of Stonehenge constructed to shoot the explosion.
Hot Rod has a French accent in the film. His voice actor Omar Sy is actually French, and is exaggerating his native Parisian accent.
Many of the scenes were filmed in the north east of England, with several streets in Newcastle Upon Tyne brought to a standstill, while scenes were completed.
Peter Cullen, Reno Wilson, and Mark Ryan are the only actors to appear in all five live-action Transformers films, with Cullen as Optimus Prime, Wilson playing Frenzy, Mudflap, Brains, Mohawk, and Sqweeks, and Mark Ryan voicing Bumblebee, Jetfire, a military drone operator, Lockdown, and Bulldog.
Optimus Primal, Optimus Prime's successor in Beast Wars: Transformers (1996), was going to appear in the film as a Knight of Cybertron with a gorilla design.
Voice actors John Goodman, Steve Buscemi, and John Turturro appeared in The Big Lebowski (1998).
The filmmakers admitted that there were production difficulties in this film, which resulted in a lot of material planned and filmed, but which never made it to the film.
Bulldog, the Mark IV tank Transformer, is based on the tank transformers Warpath from The Transformers (1984) (a slightly unhinged robot) and Blitzwing from Transformers: Animated (2007) (a robot who wears a helmet and monocle).
Hot Rod's alternate mode in The Transformers: The Movie (1986) and The Transformers (1984) was a concept car and a Ford GT, but this was revised to a Citroën DS, and later a Lamborghini Centenario.
Hot Rod's French accent was Michael Bay's idea, as he thought it would give Hot Rod a unique character.
A portion of the Loop 303 freeway in Arizona was shut down for five days in mid June 2016 for filming.
The Decepticon Nitro Zeus was named after the code name for a shelved American offensive plan.
The Knights of Cybertron have their ship hidden in a mountain range in England. The Autobots had their base in a similar location in The Transformers (1984), although that was in America.
This is the second Michael Bay film to have a World War II setting, after Pearl Harbor (2001).
This was the first movie to be filmed almost entirely with IMAX 3D cameras with two ARRI Alexa IMAX cameras mounted onto a 3D rig with an astounding 98% of IMAX footage in the film.
Though this film was successful, grossing over $600 million worldwide, this is the lowest grossing film of the Transformers franchise.
Hound is the second transformer to mention his dad. After Cade's one way call with Tessa, he says "My dad never called me." The first transformer to mention his dad was Jetfire in Transformers: Revenge of the Fallen (2009), where he said his father was the first wheel and didn't transform into anything.
Sir Anthony Hopkins is the third Marvel Cinematic Universe actor to star in a Transformers movie, after Hugo Weaving (the voice of Megatron in the first three films), and he is the second actor from the RED comic book movies to do so after John Malkovich (Bruce Brazos in Transformers: Dark of the Moon (2011)).
This is the second Transformers installment for Stanley Tucci, who played Merlin. Previously he played Joshua Joyce in Transformers: Age of Extinction (2014).
Laura Haddock sent her video audition to director Michael Bay in the US and he was so impressed he traveled to London to meet with her to discuss the role. She later received a call from him with an offer of the part.
This is the third Transformers film to be outgrossed by a computer animated threequel. This film was outgrossed by Despicable Me 3 (2017). The first was Transformers, (2007) which was outgrossed by Shrek the Third (2007), and the second was Transformers: Revenge of the Fallen (2009), which was outgrossed by Ice Age: Dawn of the Dinosaurs (2009). But while Transformers was $89.7 million behind Shrek the Third and Transformers: Revenge of the Fallen was $50.4 million behind Ice Age: Dawn of the Dinosaurs, this film is over $420 million behind Despicable Me 3.
The original cut of the movie supposedly was much longer and roughly a whole hour's worth of footage was cut for theatrical release.
The Autobot Topspin from Transformers: Dark of the Moon (2011) appears in this film, but with a head akin to Leadfoot's, and a new name, "Volleybot".
Omar Sy (Hot Rod) is the fourth actor from the X-Men franchise to appear in a Transformers feature. The previous three actors were Ty Olsson (Mithcell Laurio in X2: X-Men United (2003)), who played Downshift in Transformers: Energon (2004), Kelsey Grammer (Beast/Hank McCoy), and T.J. Miller (Weasel), who were both in Transformers: Age of Extinction (2014).
When Megatron first appears, General Morshower says he recognizes his voice. This might be an inside joke, since Megatron was voiced by Hugo Weaving in the first three films and subsequently by Frank Welker.
Topspin is the only wrecker that is confirmed to be still alive. Roadbuster's status is unknown, and Leadfoot is dead, as footage of him being hunted by the cemetery wind was shown in Transformers: Age of Extinction (2014).
Despite the fact that this was filmed almost entirely with ARRI Alexa IMAX 3D cameras, "Filmed in Panavision" is listed in the end credits although some shots in the movie are filmed this way.
Jim Carter (Cogman) and Phoebe Nicholls (Aunt Helen) previously worked together in ITV's Downton Abbey (2010).
This is Jim Carter's third live-action adaptation of an animated show, movie, or book adaptation, after 102 Dalmatians (2000) and Alice in Wonderland (2010).
In the mission control room, Moving Picture Company (MPC) Visual Effects Editor Leah Jones can be seen as N.A.S.A. scientist.
The Paramount Pictures logo at the beginning of the film actually appears after the production company credits.
Screened in theaters for only 9 weeks, the shortest of any Transformers film when compared to Transformers's (2007) 18, Revenge of the Fallen's (2009) 16, and Dark of the Moon (2011) and Age of Extinction's (2014) 15.
Star Wars Crossover - The Drones look like Tie Bombers, Cogman looks like a C3-PO relative and the helmet of the Autobot with the French Accent looks like the Bounty Hunter Helmet from Princess Leia in her Mission toll Rescue Han Solo from Jabba's Palace.