Kim Sa-eun and Sungmin (OSEN)

Veteran idol group Super Junior’s Ryeowook will sing a nuptial song at his group member Sungmin’s wedding ceremony on Dec. 13, according to a local news outlet on Wednesday.

The two have maintained close relationships since the group debuted 10 years ago.

Ryeowook and Sungmin (OSEN)

“Ryeowook will sing to celebrate the couple’s wedding. And the private wedding will be attended by only their family, friends and colleagues. There will be neither a news conference nor a photo session,” Sungmin’s side said.

Sungmin and Kim's wedding card (OSEN)

Sungmin and 29-year-old actress Kim Sa-eun first met in the musical “The Three Musketeers” late last year. Their friendship evolved into a romance, and they made public their relationship in September.

The wedding will be held at the luxurious Raum in southern Seoul.

By Park Gyu-oh (q5park@heraldcorp.com)