(Yoona's Instagram)

Yoona met with “The King Loves” co-star Park Ji-hyun and congratulated the actress for her role in hit horror film “Gonjiam.”

The photo of the two, alongside other friends, appeared on Yoona’s Instagram on Wednesday.

“We always gather on the spur of the moment,” wrote Yoona, “Ji-hyun, congratulations on Gonjiam.”

“Gonjiam” is the name of a real, now-shut-down, mental hospital in Gwangju, Gyeonggi Province. It was selected by CNN as one of the seven creepiest places on Earth. Two weeks in to the movie’s release, more than 1.6 million people watched the movie for its hair-raising tale of seven reckless souls who dared to enter Gonjiam’s premises.

Currently, Gonjiam is also the name of both a regional district and a famous stone.

By Lim Jeong-yeo (kaylalim@heraldcorp.com)