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 ...

Although 'XO, Kitty' star Sang Heon Lee was born in South Korea, he speaks with a noticeable English accent. Here's what you need to know.

Gia Kim made a huge splash with her first-ever ... I interviewed your brother, Sang Heon Lee, and asked him this question and I’m interested to see what you think. Is there ever any beef at ...

Gia Kim plays Yuri Han a popular ... hot topic at school as well,” said Kim. “Which I think is very similar to KISS.” Min-ho is played by Sang-heon Lee, who happens to be Kim’s brother.