On December 13, J.Y. Park posted a series of photos/video clips via Instagram capturing memorable moments from his birthday party.

Fans, JYP staff as well as junior idols got together to celebrate J.Y. Park's birthday.

The GOT7 members prepared a cake while TWICE members Tzuyu, Dahyun, and Nahyun gave a greeting message and sang happy birthday to their dear boss, in a cute way.  Former IOI member Jeon So Mi also dedicated a special birthday song as well.

SEE ALSO: J.Y. Park reveals that he will become a father next year!

As for the JYP staff, they held a surprise party during the middle of a meeting, catching their boss off-guard.  "So surprised in the middle of a meeting LOL Thanks guys but no more since I get really surprised TT", he reacted.

For the grand cake he received, J.Y. Park commented, "Thank you for the cake, drinks and most of all your touching letters...seems like I'm always receiving TT."

Happy birthday, J.Y. Park!

#JYP #Birthday 케잌, 식혜 그리고 무엇보다도 편지들 정말 감사해요. 맨날 받기만 하는 것 같아서...ㅠㅠ Thank you for the cake, drinks and most of all your touching letters...seems like I'm always receiving TT

A post shared by J.Y. Park (@asiansoul_jyp) on Dec 13, 2017 at 3:00am PST

#JYP #Birthday #Twice #Birthdaysong 얘네들 어쩌면 좋죠?^^ What should I do with these girls? :)

A post shared by J.Y. Park (@asiansoul_jyp) on Dec 13, 2017 at 12:16am PST

#JYP #Birthday #몰래카메라 #CandidCamera 회의하다 말고 깜짝 놀랐네 ㅋㅋ 고마워요♡ 근데 내년엔 하기 없기...진짜 놀래서^^;; So surprised in the middle of a meeting LOL Thanks guys but no more since I get really surprised TT

A post shared by J.Y. Park (@asiansoul_jyp) on Dec 12, 2017 at 10:59pm PST

#JYP #Birthday #Got7 깜짝! 고마워 얘들아~^^ Pleasant surprise! Thanks guys :)

A post shared by J.Y. Park (@asiansoul_jyp) on Dec 12, 2017 at 7:50am PST

#JYP #Birthday 감사해요...ㅠㅠ Thank you! :)

A post shared by J.Y. Park (@asiansoul_jyp) on Dec 12, 2017 at 7:47am PST

#JYP #Birthdaysong #Somi #소미 So cute^^ 고마워~♡

A post shared by J.Y. Park (@asiansoul_jyp) on Dec 13, 2017 at 5:05am PST