Published On Jun 27, 2023
Gia Kim and Sang Heon Lee took sibling rivalry to the next level in Marie Claire's How Well Do You Know Your Co-Star? The real-life brother/sister pair and 'XO, Kitty' castmates talked secret tattoos, growing up together, and first jobs while also revealing what they hope happens in season 2 of the hit Netflix show. So let's see how well Gia Kim and Sang Heon Lee know each other
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