Song Joong-Ki
South Korean actor Song Joong-Ki Facebook/sphasiaone

Hallyu star Song Joong Ki has showered affection once again on Running Man co-star and best friend Lee Kwang Soo. The actors share a strong connection and are often seen cheering for one another.

In a recent instance, Song Joong Ki warmed up hearts of many by visiting Kwang Soo's sister at the hospital. As per reports, the actor's sister delivered a baby and apparently the boyish-looking hunk was the first guest to visit the family.

The Descendants of the Sun star reportedly rushed to the hospital along the 31-year-old at the news. The duo, who first met on the sets of variety show Running Man, also got themselves clicked with the new mom and dad at the hospital.

Song Joong Ki is quite fond of Kwang Soo and has often expressed his gratitude towards him. The 31-year-old also put forth his desire to be back on Running Man with the Asia's Prince once again: "I would go on the show at any time. Running Man is like my hometown to me. If I have the opportunity, I'd like to appear on the show," the actor said.

In an interaction with Naver, Song Hye Kyo's rumoured boyfriend once revealed that he enjoys working with Lee Kwang Soo, who did a cameo in the first episode of the popular series, Descendants of the Sun.

Remnisicing the shoot day, Joong Ki recalled: "We've always been close, so it was very comfortable filming. He was unable to sleep at all because he came after filming 'Running Man' up to the night before the day of his [cameo] filming, but he really did his best. He's my friend, but I was really touched and grateful."