That's a wrap for Mortal Engines, which will now head into the post-production phase.

That's a wrap for the filming of Sir Peter Jackson's Mortal Engines.

Wellington's Stone Street Studios, where the entire film was shot, has packed up its props while the movie goes into its post-production stage.

Jackson's publicist Melissa Booth said about 15 international artists would make their way home this week, if they hadn't left already.

SUPPLIED Mortal Engines is based on a Philip Reeve novel.

Mortal Engines has about 50 New Zealand actors in the film and there were "a lot of Kiwi" heads of departments, Booth said.

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"I think that was pretty special."

Producer Peter Jackson (right) and director Christian Rivers.

Mortal Engines is the first of a series of four books written by Philip Reeve and released in 2001.

It takes place in a steampunk post-apocalyptic future where cities are mobile and roam the planet devouring each other for fuel.

Main character Tom Natsworthy lives in one of these giant cities, but his life alters when he encounters a mysterious young rebel woman from the Outlands.

It's also director Christian River's first time directing movie.

Rivers designed creatures on The Lord of the Rings and won an Oscar for his visual effects contributions to the 2005 remake of King Kong.

"It was an an amazing crew and for Christian Rivers, this was his first feature film and he was amazing (as well)," Booth said.

The international cast included Colin Salmon (Alien Vs Predator, Resident One, Tomorrow Never Dies), Patrick Malahide (Game of Thrones), Robert Sheehan (Moonwalkers), Hera Hilmar (Da Vinci's Demons), Rege-Jean Page (Roots), Ronan Raftery (Fantastic Beasts and Where to Find Them), South Korea-born singer songwriter Jihae (TV series Mars), Leila George (Mother, May I Sleep with Danger?), and Hugo Weaving (Elrond in The Lord of the Rings).

Some of the crew were spotted partying in Taupo's Mulligans Public House while Salmon had "an extraordinary experience" watching the Lions beat the All Blacks.

Jihae said she would miss spending time sword and gunfighting with her Mortal Engines family.

"After 3.5 glorious months, I will miss #newzealand for the nature's beauty, sunlight, sword & gun fighting and most of all the big beautiful #mortalengines family of 500 peeps," she posted on Instagram.

Stephen Lang, who starred as the heartless Colonel Miles Quaritch in Avatar, was also in town for the filming of Mortal Engines.

He's been cast for the next three movies in James Cameron's Avatar film series. It seems Quaritch will return from the dead.

Mortal Engines will be released on December 14, 2018.