While many of "The LEGO Batman Movie's" big name voice actors -- Will Arnett, Michael Cera, Rosario Dawson, Zach Galifianakis -- are known, the actors behind a few of the Dark Knight's A-list villains have remained a mystery. That's all changed as the full cast list for the "LEGO Batman Movie" has been revealed, and it includes a few surprises.

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On the Bat-villain front, the cast list also includes the Riddler (Conan O'Brien), Scarecrow (Jason Mantzoukas), Bane (Doug Benson), Catwoman (Zoe Kravitz), Clayface (Kate Micucci) and Poison Ivy (Riki Lindhome). Additionally, Channing Tatum and Jonah Hill are reprising their "LEGO Movie" roles as Superman and Green Lantern. Adam Devine joins the LEGO Justice League as The Flash.

But there are apparently plenty of other characters in the film that aren't from the DC Universe -- and their involvement could be a big spoiler considering that they've been absent from all promotional materials so far. You've been warned!

The official cast list includes a group of characters called The Ubers that originate from outside the DC Universe. They include "Harry Potter" villain Voldemort (voiced by Edie Izzard), King Kong (Seth Green), "Lord of the Rings" bad guy Sauron (Jemaine Clement) and a mystery character known only as Phyllis (Ellie Kemper). It's not yet clear how these non-comic book characters will appear in the "LEGO Batman Movie." The parent movie "The LEGO Movie" mashed up characters from all different franchises, so it's possible that similar world-building rules will be applied to this spin-off.

It's also worth noting that Chris Hardwick's name isn't included in this batch of actors, even though he recently revealed that he voiced characters in the film. The voice actors for Mr. Freeze and the Penguin have yet to be revealed, though, or it's possible that Hardwick voiced original characters created for the film.

A spinoff of “The LEGO Movie,” the animated “LEGO Batman Movie” focuses on Will Arnett’s super grim Dark Knight as he takes on a ward (Michael Cera’s Robin) and clashes with a number of his iconic foes (like Zach Galifianakis’ Joker and Jenny Slate’s Harley Quinn).

Directed by Chris McKay, and from a script by Seth Grahame-Smith, Chris McKenna and Erik Sommers, “The LEGO Batman Movie” stars Will Arnett as Batman, Michael Cera as Robin, Ralph Fiennes as Alfred, Mariah Carey as the Gotham City Mayor and Billy Dee Williams as Two-Face. Both films are set to hit theaters on February 10.

(via Collider)