Lee Hong Ki and Lee Seung Gi want to be bad, that is, they both want to try playing bad guys.

Playing a troublemaking pop star in his new movie, "Passionate Goodbye" is not bad enough for FT Island's Lee Hong Ki. In the future, he wants to act the part of someone really bad, maybe even the devil.

It's not the first time he has played a pop star, as he was Jeremy, a member of the band Anjell in "You're Beautiful." But he says acting the part of the biggest pop star in Korea was a stretch.

"I'm not the best in reality," said Lee Hong Ki, who worried so much about his performance that he could not sleep. "I do complain a lot in real life though, so that part of my role was not difficult."

But he would like to stretch his acting abilities even more. To avoid being typecast and maybe provide a contrast to the adorable Jeremy, he would like to be one of the bad guys.

"I would like to play parts that are not singers," said Lee Hong Ki, 23, at a recent press conference. "Roles like monsters in science fiction, vampires or that devil figure in the film "Death Note."

In his new film, his idol singer character is forced to do hospice work, which makes him realize what's important in life. It premieres on May 30.

At a press conference for his popular drama, "Gu Family Book," Lee Seung Gi also expressed the desire to play a bad guy. The role of the spoiled rich kid in "Shining Inheritance" is about as bad a character as he has taken on so far. Playing a character that lives off his grandmother's money was just not bad enough.

"I want to try acting in a villain role some day," he said. "But having life experience is important for a role like that so I think I'll try it around the time I'm in my late 30s and 40s."

Lee Seung Gi, 26, also played a prince in MBC's King 2 Hearts, a student in the SBS drama, "My Girlfriend is a Gumiho."

Like Lee Hong Ki, he is good at playing "cute," but he thinks he will have to try a villainous role if he wants to score any serious awards. He may be up for an award this year. His new series, "Gu Family Book," in which he plays a half-human, half-mythical creature, has consistently won the ratings for its time slot. He also earned praise from fellow actors for his total immersion in the role.