Christina Aguilera Gives Off Sexy Morticia Vibes During 'The Addams Family' Premiere

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Christina Aguilera fully immersed herself in the Halloween spirit for the big premiere of "The Addams Family," and looked like she would fit in at a family reunion.

Aguilera is not actually playing a character in the new 3D computer-animated reboot, but she did release one of the main songs featured on the soundtrack, "Haunted Heart."

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The 38-year-old was wearing a floor-length tight black dress with a plunging neckline and even kept her "evil" theme going with sparkly green snakes wrapped around her fingers.

Aguilera kept the premiere a family affair by walking the red carpet with fiancé Matthew Rutler and children, Max and Sumer.

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Rutler and Aguilera have been together for years, and originally hooked up after her divorce from music producer Jordan Bratman,

The two have been engaged since 2014 but have not yet announced any plans for a wedding.

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Along with Aguilera, the stars of "The Addams Family" walked the carpet for the premiere, including Charlize Theron, Chloë Grace Moretz, Finn Wolfhard, Nick Kroll and Snoop Dogg.

Even though she's actually playing Morticia, Theron kept it more hipster than horror with an ankle-length pleated tie-dye skirt.

Moretz also kept it lighter than her character of Wednesday Addams, and wore a beautiful long-sleeve navy blue dress contrasted with a pink satin design on top.

Snoop Dogg plays Cousin Itt, and kept it cool in a blue outfit paired with aviator sungalsses and a chain.

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The premiere also brought out former "Addams Family" star Christopher Hart ... but you may only recognize his mischievous hand as Thing, who starred in the 1991 film and its 1993 sequel, "Addams Family Values."

"The Addams Family" hits theaters October 11.