XO, Kitty's Gia Kim Wishes 'Lil Bro' Sang Heon Lee a 'Happy Birthday,' Shares Childhood Photos

XO, Kitty's Gia Kim Wishes 'Lil Bro' Sang Heon Lee a 'Happy Birthday,' Shares Childhood Photos

Gia Kim is celebrating her younger brother Sang Heon Lee‘s birthday!

The XO, Kitty star took to Instagram on Monday (May 22) to wish her co-star and real life sibling a “Happy Birthday,” while sharing some super cute photos from their childhood.

Check out what she wrote inside…

“Hbd to the first human being who entered into my life who I loved unconditionally (except our parents) even before I knew what unconditional love was. You were the first living thing 😂 that I wanted to take care of and keep under my wings always. So happy and lucky to have you lil bro,” Gia wrote on her post.

“And omg just still can’t get over how GOSH DARN TOOTIN CUTE YOU WERE AS A BABYYYYY 😭🥹❤️❤️❤️❤️ I MEAN LOOK AT THAT LITTLE HUMAAAAN !!!” she continued. “You’re all grown up now… ew… with girls fawning over you…. which I’ll always find weird. But also… thank god you’re growing up bro. 😜 Excited to see the person you’ve become and are becoming. Lav you darrrlin’ Keep up your happy energy xxx ㅅ ㅏ ㄹ ㅏㅇ 하ㄴ 당”

Sang Heon commented on the post, writing, “Thanks ‘bro’ 😏👊”

If you didn’t know that they are siblings, now you know! Their co-star Minyeong Choi revealed that they were related last week as the show premiered on Netflix.

Happy Birthday Sang Heon Lee!!!

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Photos: Getty
Posted to: Gia Kim, Sang Heon Lee