TWICE's "TT" has become one of the most-performed songs during concerts and fan meeting shows. Some of the celebrities who got swayed by the dance craze include Lee Joon Gi, Taeyeon and BTS' J-Hope and Jungkook.

And just recently, our favorite Grim Reaper from tvN's "Goblin" took the challenge of performing his own version of TWICE's "TT" dance during his Seoul fan meeting Sunday.

In fact, Lee Dong Wook's dance video has gone viral on the internet, particularly on Facebook. Koreaboo cited the Hallyu actor was kind of shy when he performed the dance craze in front of his fans.

At some point, the "Goblin" actor even covered his face because of embarrassment. Nonetheless, it was evident that Lee Dong Wook might have practiced for the performance as he almost perfected the moves.

The 35-year-old actor also succeeded in making his fans happy as most of them, if not all, were satisfied of his "TT" dance.

On the other hand, Lee Dong Wook was joined by his "Goblin" co-actor Gong Yoo during his "4 My Dear" in Seoul. The two good-looking stars even recalled their experience working for the tvN drama.

They also showed their sincerity and admiration when asked about their thoughts of each others. "[Lee Dong Wook is] a grateful savior in my acting life," Gong Yoo said as per Soompi.

The "Hotel King" actor, on the other hand, commended the "Train to Busan" lead for his good looks. "It's like looking at a coffee commercial," Lee Dong Wook described his co-actor's features.

However, Gong Yoo refused to agree with his pal and said, "Lee Dong Wook is just so handsome, while I'm just plain."

The two actors entertained their fans with a skit of "Goblin," wherein they spontaneously exchanged funny dialogues from the blockbuster hit.

Meanwhile, watch Lee Dong Wook's performance of TWICE's "TT" and try not to fall for his cuteness!