Girls’ Generation’s Sunny caught the attention of more than just her colleagues and fans with her costume!

On October 31, SM Entertainment held their annual Halloween party “SMTOWN Wonderland.”

This year, Sunny chose to go as the human interpretation of Nagini, who was originally a snake in the popular “Harry Potter” series.

In honor of Halloween, the author of the novels, J.K. Rowling, took to her Twitter account to compliment various people on their costumes of characters from the series.

One fan brought Sunny’s costume to the author’s attention, with her faint snake-like skin makeup and her piercing eyes. J.K. Rowling praised the idol, commenting, “Stunning!”

Meanwhile, Nagini will be portrayed by actress Claudia Kim in the upcoming film “Fantastic Beasts: The Crimes of Grindelwald,” which is set to be released on November 16.

What did you think of Sunny’s costume?