SEOUL (AFP, Korea Herald/Asia News Network) - K-pop star Rain will marry K-drama star Kim Tae Hee, he announced via a handwritten letter on Tuesday (Jan 17).

"I am ready to be a good husband and a man as the head of a household. She stood by me through thick and thin," the message read. "She's the greatest gift of all."

His agency Rain Company said: "We don't know the exact date when they are tying the knot. However, the ceremony will be small and private."

The couple are expected to wed at a Catholic church in Seoul on Thursday with family members in attendance as Kim is a devout Catholic, Yonhap News Agency said, citing industry insiders.

Rain, 34, and Kim, 36, first met while shooting a television commercial in 2011 and began dating a year later.

He has starred in South Korean dramas, including Full House (2004) and The Fujitive Fugitive: Plan B (2010), as well as Hollywood action pictures such as Speed Racer (2008) and Ninja Assassin (2009).

Kim has starred in dramas including Love Story In Harvard (2004), Iris (2009), My Princess (2011) and The Gang Doctor (2015).