AOA's Seolhyun will be introducing her older sister Kim Joo Hyun to her fans for the first time ever through Mnet's upcoming new variety program, 'I'm Not The Person You Used To Know'!

Seolhyun's sister will appear as one of the participants of an exclusive quiz about Seolhyun on the very first episode of 'I'm Not The Person You Used To Know', where she'll expose some of Seolhyun's "realest" sides! Viewers will not only get to watch Seolhyun and her sister spending time together on an average day through a pre-recorded VCR, but also their talk and quiz answering live in the studio. 

After the program, Seolhyun's sister said, "I had fun and thought I made a great memory through this program, and I was also able to see a side of my sister I didn't know about. I am proud of her because she seems like she's doing well out in society." 

You can catch Seolhyun and her older sister Joo Hyun together on 'I'm Not The Person You Used To Know', premiering on December 20 at 11 PM KST.