The 18-year-old Modern Family star posted the shot on Instagram.
Not only does she wear a Santa Baby costume, but Ariel also rocks a platinum blonde wig!
Meanwhile, Levi suits up with a “naughty” Santa hat.
“My Christmas #mcm,” Ariel captioned the pic, with some cute emojis.
Over the weekend, she stepped out at The Grove to visit Santa Claus with some of her family members.