Previously, Lee Jun Ki and IU worked together on the set of SBS's 'Scarlet Heart: Ryeo', captivating viewers with their tragic romance. After building up a close friendship through their drama production, it seems the friends were able to reunite as guests on an episode of 'Knowing Brothers'!

Furthermore, it's reported that Lee Jun Ki coolly agreed to help IU promote her comeback through their joint 'Knowing Brothers' appearance. No airing date for Lee Jun Ki x IU on 'Knowing Brothers' has been announced yet, so stay tuned!