Secretly, Greatly is a South Korean variety show. It is a segment of television network MBC's "Sunday Night" lineup and features segments where unsuspecting celebrities are caught off-guard with hilarious hidden-camera pranks. The show is hosted by Kim Heechul of Super Junior, Lee Soo Geun, Yoon Jong Shin, Lee Guk Joo and John Park. Launched on December 4, 2016, Seolhyun of AOA was the show's first guest celebrity. Don't miss a minute of this fun new variety show!