• (L-R) Actors Yoo In-Na, Gong Yoo, Kim Go-Eun, Yook Sung-Jae, Lee Dong-Wook attend the first script reading session of tvN's 'The Lonely, Shining Goblin.'

(L-R) Actors Yoo In-Na, Gong Yoo, Kim Go-Eun, Yook Sung-Jae, Lee Dong-Wook attend the first script reading session of tvN's 'The Lonely, Shining Goblin.' (Photo : YouTube/Jackson GOT7)

With "Goblin's" immense popularity, tvN has rewarded the entire cast and staff members with a paid vacation trip to Phuket, Thailand. However, the main cast's participation in the said vacation treat remains unclear.

On Jan. 02, Thursday, it was revealed that Gong Yoo, Lee Dong-Wook, Kim Go-Eun, Yoo In-Na and Yook Sung-Jae will not be able to attend the celebratory trip due to their busy schedules. While their respective agencies did their best to adjust the actors' schedules, they were unable to accommodate the said vacation since the cast received a lot of love calls from various TV projects, movies, and ads photoshoots.

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Further, the BTOB member is currently busy filming for the SBS reality-documentary show "Law of the Jungle." The show's production company Hwa & Dam Pictures, on the other hand, expressed their surprise at the news.

"The plane tickets were bought and other reservations are all finished already," a source from the company said in a press statement obtained by Soompi. "We didn't receive any word from the actors [about them not being able to come]."

Nonetheless, fans can still watch the actors' in the upcoming special episodes of "Goblin." The popular fantasy drama will continue with two special episodes that are scheduled to air on Feb. 3 and Feb. 4.

Ahead of its official release, tvN gave viewers a sneak peek into the special episodes by releasing two short teasers on Naver TV. In the clips, Gong, Lee and Yoo reminded viewers to stay tuned to see the upcoming specials.

The highly anticipated special episode will reportedly feature several unseen footages, behind-the-scenes clips, blooper reels and more interviews with the cast members. It will also include Ji Eun Tak (Kim) and Kim Shin's (Gong) movie date scene, where they watched the latter's global hit zombie film "Train to Busan."

While waiting, check out the finale of tvN's "Goblin" below: