Jamie Lee Curtis, the actress known as the queen of the "Halloween" horror film franchise, went incognito with her family at the 2015 Evolution Championship Series (EVO) in Las Vegas, E! News reported. Curtis wore a costume and cosplayed as "Street Fighter" character Vega and proved she's a cool mom.

"Grad trip to @evo2k. [sic] 2 stay incognito was Vega who wears a mask. @StreetFighter family. DJ, Dr. [sic] Bosconovich, Makoto," the 56-year-old tweeted, along with a family photo of her husband Christopher Guest and their two children dressed as video game characters.

Curtis dressed as Vega from "Street Fighter II: The World Warrior," her hubby dressed as Dr. Bosconovitch from "Tekken," their son Thomas dressed as Dee Jay from "Super Street Fighter II," and daughter Annie dressed as Makoto from "Street Fighter III: 3rd Strike."

The family attended EVO, one of the biggest tournaments in the world of competitive fighting games, as a graduation present for Thomas, according to AV Club. Curtis revealed her inner gamer nerd during an interview for her 2015 film "Spare Parts."

"I play 'Street Fighter' more than you will ever know," Curtis told MyFox DC. "I'm that person. I spend a lot of time playing 'Street Fighter.' I play a lot of 'Street Fighter.'"

See the cool family photo in Curtis' tweet below.

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