JTBC confirmed the news on August 16, "JR and Park Sung Kwang will be on 'Knowing Brothers'."
The pair is on JTBC's other variety show 'Night Goblin' along with Lee Soo Geun, Jung Hyung Don, and F.T. Island's Hongki. As Lee Soo Geun is one of the 'Knowing Brothers' members, fans had been long anticipating the 'Night Goblin' cast on 'Knowing Brothers', and now it's finally happening!
The broadcast date is currently undecided.