Mnet's new quiz variety program 'I'm Not The Person You Used To Know' (name inspired by 'SMTM5' song "Who You") is premiering this December 20 at 11 PM KST!

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Hosted by Lee Soo Geun, DinDin, NU'EST's JR, and Jang Do Yeon, the program invites the close friends and acquaintances of various celebrities per episode in order to allow these guests to guess how particular celebrities will react in given situations. 

You can check out the official poster for 'I'm Not The Person You Used To Know' below, as well as a sneak preview of the program's quiz format in a teaser featuring GOT7, above!