Yunjin Kim is the first Korean actress to break into Hollywood.

Yunjin Kim is the first Korean actress to break into Hollywood.

Yunjin Kim is uncomfortable with the chair she has been given. She requests a lower one. Possibly this is because she is wearing very short shorts. It's more likely she doesn't want to look down on anyone.

She could if she wanted. Kim is a big star, not just through her international break-out role on Lost but in Korea where she is known for breaking box office records. She is sometimes referred to as "the Korean Julia Roberts".

"I'm actually the very first Korean actress to cross over to Hollywood, so that's special," she says, with pride rather than arrogance. "I'm on a show where I'm actually speaking Korean. It's really odd."

It's also odd to see her immaculately made up, just as it's odd to know she has posed for men's magazines and become, like Lost co-star Evangeline Lilly, something of a sex symbol. It's only in the third season Kim has had an opportunity to flaunt her sexuality. Flashbacks painted her character Sun as demure, defeated and desperate at the hands of men. Her father was overbearing, her husband Jin jealous and domineering. Sun was always a bit of a victim.

Kim was happy about this to begin with because it meant she wasn't hated. "Maggie Grace [who played Shannon] - everyone hated her because she was this rich, spoiled girl. Sun's from a very wealthy family too but she's never come across that spoiled or bratty. She's a good woman overall so I think I got a lot of sympathy."

However, in season three she wasn't as victimised as it seemed. She had an affair with her English teacher, she sailed a boat and she killed one of the Others. Now that she's pregnant she wouldn't be surprised if the father was the island itself, in some kind of immaculate conception complete with "a baby that looks like a monster or something, black smoke coming out of Sun".

"I'm so happy to see her dark side," she says. "I thought she was just a perfect angel. And I kept on saying it doesn't make sense because all of the other characters have killed one or two people at least ... I'm sure she's evil."

Lost is notorious for keeping its actors as much in the dark about the plot mysteries as the viewers but if there's anyone with power over the outcome of the show, it's Kim and her co-star, Daniel Dae Kim.

"In the first season there was a translator but it was a little translation from the lines which in Korean didn't quite flow well. It didn't make sense so a lot of times I had to redo those translated lines to make it more conversational language. And I still do. We're sitting here talking Korean and of course none of them understand. So we could be talking about a pink elephant in the room, and we could go on and on and they won't know."