Sexy 'Stranger Things' costume draws online backlash

The adult costume is based on the character Eleven.

The "Upside Down Honey" costume is based on Millie Bobby Brown’s onscreen character, Eleven, but is intended only for adults.

It features a short light-pink baby-doll dress with a ruffled bust, thigh-high white socks, a bomber jacket and accessories.

One retailer selling the costume, Yandy Lingerie and Costume Company, told ABC News in a statement, "We don't take ourselves too seriously and neither do our customers."

"The Yandy girl strives to be the talk of the Halloween party," the company statement said. "And we've found these topical, pop culture inspired costumes with a fashion-forward twist are always a fan favorite year after year."