This fall, one of the most unique movies will be, without a doubt, A Monster Calls. The family drama will introduce legendary actor Liam Neeson as a mythical creature who befriends a young boy. Today, we have your first look at the official one-sheet poster, which gives us a sneak peek at this monster in hiding. The tagline promises that 'Stores are Wild Creatures'.

A Monster Calls is a visually spectacular drama from director J.A. Bayona (The Impossible). 12-year-old Conor (Lewis MacDougall), dealing with his mother's (Felicity Jones) illness, a less-than-sympathetic grandmother (Sigourney Weaver), and bullying classmates, finds a most unlikely ally when a Monster appears at his bedroom window. Ancient, wild, and relentless, the Monster guides Conor on a journey of courage, faith, and truth. Toby Kebbell plays Conor's father, and Liam Neeson stars in performance-capture and voiceover as the nocturnally visiting Monster of the title.

A Monsters Call comes as an interesting change of pace for Neeson, who has become an action icon in the later half of his extraordinary career. The movie is an adaptation of Patrick Ness' beloved novel, with the writer adapting his own screenplay. As of yet, we haven't really gotten a great look at the monstrosity hiding at the core of this heart-tugging fantasy. But he is starting to come into focus here on this teaser.

The movie's story is actually based on an original idea by the late Siobhan Dowd. A British writer and activist, she is best known for a body of work that appeals to children and young adults. A Monster Calls has been published in almost 30 languages, and the novel has won many prestigious prizes worldwide, including the distinguished Carnegie Medal and, for illustrator Jim Kay, the Kate Greenaway Medal.

Belén Atienza is producing, marking her third collaboaration with Bayona, following The Impossible and his directorial debut, The Orphanage. Executive producers include Participant's Jeff Skoll and Jonathan King, along with River Road's Bill Pohlad and Mitch Horwits. Production on A Monster Calls got under way last September, with principal photography taking place in Spain and England.

A Monster Calls is set for release on October 21, 2016, which puts it up against Lionsgate's Boo! A Madea Halloween Story, Paramount's Jack Reacher: Never Go Back, 20th Century Fox's Keeping Up With the Joneses, Universal's Ouija: Origin of Evil and PureFlix's I'm Not Ashamed. Coincidentally, Felicity Jones also stars in Inferno, arriving October 14, meaning she will have two of her projects debut in back-to-back weekends. While we await the next trailer for A Monster Calls, which may give us a better look at this wild creature, take a look at the first poster and marvel at the adventure that awaits.