On August 11, So Yoo Jin posted a series of photos celebrating her birthday, with the caption, "Oh, my... thank you for the birthday wishes. Hope everyone has a pleasant day!"

The photos featured a birthday meal consisting of traditional seaweed soup and a bouquet of flowers, which her husband Baek Jong Won specially prepared for her.

So Yoo Jin also shared the lovely news of welcoming a third child into the family. She wrote, "And... I will also enjoy my day with Seohyun's sibling, who is inside my belly."

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Meanwhile, the couple tied the knot back in January of 2013 and currently has one son, Yongheee, and one daughter, Seohyun. It has been revealed that the actress is 12 weeks pregnant and is due in February of 2018.

Congratulations to the family!

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A post shared by So Yujin (@yujin_so) on Aug 10, 2017 at 6:40pm PDT