SBS' 'Running Man' co-stars Lee Kwang Soo and Gary showed off their friendship through a photo while in the midst of filming for the show, bringing smiles.

Lee Kwang Soo shared on his Twitter on the 18th, "I will forever be on hyung's side <3", along with the photo above.

Despite his adorable tweet, fans of the show should know he may change his mind about that as the representative 'betrayer giraffe' on the show!

Viewers commented, "Kwang Soo, you're going to betray Gary!", "Gary's facial expression is hilarious", and "Both oppas are cute."