SEE ALSO: Actress So Yoo Jin announces her pregnancy

So Yoo Jin shared the good news on her Facebook on the morning of the 10th, "After 11 hours in labor, I gave birth to my child last night on the 9th, three days past the original due date... Maybe it's because I thought it would be very painful and was very nervous, but it was better than I thought it would be."

Her agency also commented, "So Yoo Jin and Baek Jong Won couple had a healthy baby boy. The mother and the baby are both healthy."

The actress tied the knot with Baek Jong Won, a restaurant owner who is 15 years her senior, in January 2013, and the're now celebrating their first child together.

Congrats to the family on the wonderful addition!