The "Bigfoot" legend gets an animated twist in "Smallfoot," opening in theaters this September.

Warner Bros. showed off the official "Smallfoot" trailer during CinemaCon. Channing Tatum voices a Yeti named Migo, who discovers a human -- aka Smallfoot -- previously thought only to be a myth. It's a tough sell to convince everyone else, though, when proof of said Smallfoot seems elusive.

The stellar voice cast also includes James Corden, Zendaya, Common, LeBron James, Gina Rodriguez, Danny DeVito, Yara Shahidi, Ely Henry, and Jimmy Tatro.

WB added that "Smallfoot" will feature original music, so we can look forward to hearing that. The trailer features Journey's "Don't Stop Believin'" which just fits with the story.

Here's the cute trailer:And here's the full rundown from Warner Bros.:

An animated adventure for all ages, with original music and an all-star cast, "Smallfoot" turns the Bigfoot legend upside down when a bright young Yeti finds something he thought didn't exist—a human.

News of this "smallfoot" throws the simple Yeti community into an uproar over what else might be out there in the big world beyond their snowy village, in an all new story about friendship, courage and the joy of discovery.

"Smallfoot" stars Channing Tatum ("The LEGO® Batman Movie," the "Jump Street" films) as the Yeti, Migo, and James Corden ("Trolls," "The Emoji Movie") as the Smallfoot, Percy. Also starring are Zendaya ("Spider-Man: Homecoming"), Common ("Selma"), LeBron James (upcoming "Space Jam 2"), Gina Rodriguez ("Jane the Virgin"), Danny DeVito ("The Lorax," Oscar nominee for "Erin Brockovich"), Yara Shahidi (TV's "Black-ish"), Ely Henry (TV's "Justice League Action"), and Jimmy Tatro ("22 Jump Street").

"Smallfoot" is directed by Karey Kirkpatrick, Annie Award-winning director of "Over the Hedge" and Annie nominee for the screenplays for "Chicken Run" and "James and the Giant Peach." The film is produced by Bonne Radford ("Curious George"), Glenn Ficarra ("Storks," "The is Us,") and John Requa ("Storks," "This is Us"). Serving as executive producers are Nicholas Stoller, Phil Lord, Christopher Miller, Jared Stern, Sergio Pablos, and Kirkpatrick. The creative team includes editor Peter Ettinger, and composer Heitor Pereira.

"Smallfoot" opens in theaters September 28, 2018.

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