Actor Gong Yoo turned into a 'hot pack man.'

Today, Gong Yoo's agency Management Soop revealed pictures of Gong Yoo filming for the movie "The Suspect."

During the filming days of the movie, Gong Yoo was armed with thick jackets and hot packs to keep him warm.

The movie was filmed for so long that Gong Yoo had experienced all 4 seasons while filming for it. But because the movie was only about 2 nights and 3 days of a crime case, he had to wear just a shirt and a thin jacket even in winter.

Photo Credit: Management Soop