Mariah Carey may be going Bat-ty…

The 45-year-old half-Venezuelan American singer/actress is in talks to take on the role of Commissioner Gordon in The Lego Batman Movie, the spinoff of The Lego Movie from Warner Bros.

The studio is trying to keep everything under lock and key, but sources tell Deadline.com that Carey will join Ralph Fiennes (Alfred the Butler), Will Arnett (Batman), Michael Cera (Robin), Rosario Dawson (Batgirl) and Zach Galifianakis (The Joker).

Earlier this year, the Grammy-winning songstress aligned herself to a Christmas-themed movie pitch that New Line pre-emptively bought from RatPac Entertainment, writers David Diamond and David Weissman and producer Jon Shestack.

Carey will star in the yuletide themed pic., a natural for the woman who wrote and performed “All I Want for Christmas Is You,” the insta-Christmas classic released in 1994 tune that has sold more than 14 million copies globally to become the biggest holiday perennial in recent memory and the biggest international hit of Carey’s career.

Her past screen credits include the Lee Daniels-directed Precious and the box office miss Glitter.