Ever since it was first announced last February, there have been very few story details released for Night at the Museum: Secret of the Tomb, the third and final installment of Ben Stiller and director Shawn Levy's hit franchise, until now. USA Today has released the first three photos, along with an interview where Shawn Levy reveals why the story shifts from the U.S. to London.

Take a look at the images, which feature returning cast members Ben Stiller (Larry Daley), Robin Williams (Theodore Roosevelt), Patrick Gallagher (Atilla the Hun), Mizuo Peck (Sacajawea) and Skyler Gisondo (Nick Daley), along with our first look at Downton Abbey star Dan Stevens as Lancelot.

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While the first two movies in the franchise, Night at the Museum and Night at the Museum: Battle of the Smithsonian were set in New York and Washington D.C., this third and final adventure goes across the pond to London, for a very specific reason. Here's what director Shawn Levy had to say.

"We have brought museums to life, but we have never really explored the idea of taking the magic into the world. This movie really goes beyond the museum walls. We are out in London, on a double-decker bus, in Trafalgar Square. It's a juicy idea we haven't explored."

The plot starts at the original setting, New York's American Museum of Natural History, where the Golden Tablet of Pharaoh Ahkmenrah brings these historical creatures to live every night the museum closes. This story centers on the tablet beginning to lose its power, which leads Larry Daley (Ben Stiller) and his historical friends on a journey to the famed Egyptian wing of London's British Museum to seek answers.

"We go to the British Museum in the second half of the movie because that is where the answers lie. It's not because it felt like time to get on an airplane."

Dan Stevens revealed that he enjoyed portraying the "silly, larger-than-life" side to the famed Knight of the Round Table, although one of the stranger moments in the shoot was when he had to ride a horse through Trafalgar Square.

"That was a bit bizarre."

Aside from Dan Stevens' Lancelot, fans will be introduced to a number of new characters, including the tablet's creator, the father of Ahkmenrah, played by Ben Kingsley, and Rebel Wilson as a new security guard who discovers these characters coming to life.

The movie also features the final performance from the late Mickey Rooney, who filmed his scenes with Dick Van Dyke and Bill Cobbs before he died at the age of 93 in April. Here's what Shawn Levy had to say about the late actor's last performance.

"I didn't know it was to be his last film, but it was a truly memorable shoot. He came to work."

The director also confirmed that this will be the last installment of the franchise, which helped define his career.

"These remain the most successful movies that Ben and I have ever done. Ultimately, in some ways, this is about saying goodbye to a franchise which has been career defining for both of us."
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