Question: When is the movie "Mortal Engines" coming out that an actor that played in "Misfits" is starring in?

Context articles: Traction City (novella)
Christian Rivers
Deborah Forte
A Web of Air
Mortal Engines Quartet
Fever Crumb
Fever Crumb Series
A Darkling Plain
Robert Sheehan
Mortal Engines (film)

Traction City is a novella by Philip Reeve and is a prequel to the Mortal Engines Quartet it was released as a flip book alongside Chris Priestlys' teachers tales of terror for World Book Day.
Christian Rivers is a New Zealand storyboard artist, visual effects supervisor, special effects technician and director.
 He first met Peter Jackson as a 17-year-old, and storyboarded all of Jackson's films since "Braindead".
 He also cameoed in "" as a Gondorian soldier and "King Kong" as a Soldier in Truck.
 He will also direct the upcoming adaptation of "Mortal Engines" and the remake of "The Dam Busters", both produced by Peter Jackson.
Deborah Forte is an American award-winning producer of family television series and movies, websites and digital media including "Clifford the Big Red Dog", "The Magic School Bus", "Goosebumps", "WordGirl", "Maya & Miguel", "I Spy", "The Baby-Sitters Club", "The Golden Compass" and "Astroblast".
 She created Scholastic Media, a division of Scholastic Inc. She is the founder of Silvertongue Films, and currently is producing Mortal Engines with Peter Jackson and Fran Walsh for Universal, a Goosebumps sequel for Sony, and a television adaptation of His Dark Materials.
 She is attached to produce the 39 Clues and Spirit Animals for Universal and Clifford the Big Red Dog for Paramount.
A Web of Air is a young adult post-apocalyptic science fiction novel by Philip Reeve.
 The sequel to "Fever Crumb", it is the second book in the Mortal Engines Quartet prequel series.
 It was published in April 2010.
The Mortal Engines Quartet is a tetralogy consisting of four novels written by the British author Philip Reeve: "Mortal Engines" (2001), "Predator's Gold" (2003), "Infernal Devices" (2005), and "A Darkling Plain" (2006).
 It has also been referred to as the Predator Cities Quartet or the Hungry City Chronicles, although the author has objected to those names.
Fever Crumb is a young adult post-apocalyptic science fiction novel by Philip Reeve, published in 2009.
 Sequels called "A Web of Air" (2010) and "Scrivener's Moon" (2011) follow.
 The books of the Fever Crumb Series are prequels to the Mortal Engines Quartet series of novels by the same author.
The Fever Crumb Series is the title of a series of novels written by British author, Philip Reeve, and is the prequel series to his critically acclaimed "Mortal Engines Quartet".
 As of 2015 the series consists of three books: "Fever Crumb" (2009), "A Web of Air" (2010), and "Scrivener's Moon" (2011).
 The books follow a young woman known as Fever Crumb, and her adventures set around the time of the creation of the first traction cities that become so prevalent in the Mortal Engines series.
 Reeve stated in 2011 that he had always envisaged a quartet for the series, assuring readers of a fourth installment.
A Darkling Plain is the fourth and final novel in the "Mortal Engines Quartet" series written by author Philip Reeve.
Robert Michael Sheehan (Irish: "Roibeárd Mícheál Ó Siodhacháin" ; born 7 January 1988) is an Irish actor.
 He is best known for television roles such as Nathan Young in "Misfits" and Darren in "Love/Hate", as well as the 2009 film "Cherrybomb" alongside Rupert Grint.
 He also co-starred in the film "Killing Bono" as Ivan McCormick.
 In late 2011 he starred in John Crowley's production of J. M. Synge's comic play "The Playboy of the Western World" at the Old Vic Theatre in London.
Mortal Engines is an upcoming New Zealand-American science fiction action adventure film directed by Christian Rivers and written by Peter Jackson, Fran Walsh, and Philippa Boyens.
 It is based on the novel of the same name by Philip Reeve.
 It stars Robert Sheehan, Hera Hilmar, Hugo Weaving, Jihae, Leila George, Ronan Raftery, and Stephen Lang.
 It is set to be released in theaters on December 14, 2018.