Musical actress Kim So-hyun shared her experience of the performance with the couple Song Joong-ki and Katie Lewis Saunders.

On the 19th, Kim So-hyun posted behind-the-scenes photos of the 7th regular concert "Children's Scenery" by Gaon Soloists, held the previous day at the IBK Chamber Hall of the Seoul Arts Center, on her social media. The photos showed Kim So-hyun standing side by side with Song Joong-ki and Katie, including a moment where she covered her mouth in surprise upon seeing Katie in person.

The performance was hosted by Gaon Soloists, an integrated chamber music group consisting of musicians with and without disabilities, in celebration of the 46th Disability Day. Song Joong-ki and Katie appeared on stage as narrators in the first part, marking their first official public appearance together since their marriage. Kim So-hyun made a special appearance in the second part of the concert.

Kim So-hyun said, "I was truly grateful to be part of such a beautiful performance," and added, "It was great to see Song Joong-ki after a long time, and Katie is kind and beautiful."

Meanwhile, Song Joong-ki married British actress Katie in 2023, and they have one son and one daughter.