He posted a snap of baby socks with a pink floral embellishment and captioned it: "Thank you..."
Rainannounced on Instagram today that Kim Tae Hee gave birth to a daughter. (The baby) is a pretty princess ~ We will raise this child to grow up to someone who can help the world. "#Blessing", the 35-year-old singer wrote.
The two stars tied the knot back in January and shared their pregnancy news in May.
Four months later, it was announced in May that the 37-year-old actress was 15 weeks pregnant.