The couple both came dressed as skeletons, complete with spooky makeup, but the Modern Family star's sexy costume left little to the imagination. A black leotard adorned with a skeleton graphic hugged her curves, which she paired with black fishnets and thigh-high platform boots.
The actress paired the look with a plush skeleton unicorn purse, which she showed off on Snapchat.
Winter, who just started attending classes at UCLA, has been dating Meaden for just under a year. The happy couple have been getting into the Halloween spirit, most recently at Knott's Scary Farm, where they were spotted sharing a few kisses.
In May, the star admitted to Jimmy Kimmel that she and Meaden are living together, also confessing that he does most of the cooking.
"My boyfriend and I live together, and he cooks. I can't cook at all," Winter told Kimmel. "He takes care of all that handy stuff, he's great, he does all that. I can bake a pie occasionally. Pumpkin and apple, I baked those two the other day. They were edible."
Watch below for more on the couple, including how the actress celebrated Meaden's 30th birthday.