Most of the time, Korean celebrities are strict about their diet and are very much conscious when it comes to their physical appearance. However, it becomes unavoidable when they have to change their visuals to perfectly portray the characters given to them. Some cut their hair short and even go bald, while others lose or gain weight.

These actors and actresses weren't afraid to change their looks as long as they could deliver the best performance. We all know that it's not easy to lose or gain weight healthily in a short time, but these stars have proven that anything is possible if you put your mind into it.

Check out these celebrities who intentionally gained weight to suit the roles they had to portray.

Ahn Jae Hyun in 'Beauty Inside'

In the drama "Beauty Inside," Ahn Jae Hyun portrays the character of Ryu Eun Ho who has an innocent and pure soul, and who also dreams of becoming a priest. He has a joyful and pleasant personality and is a good friend to Han Se Gae in the drama.

Ahn Jaehyun once shared in an interview that he thinks his synchronization with the character is about 300 percent. He also wanted to showcase his masculine side through this drama, that was why he gained about 8kg.

Lee Sung Kyung in 'Weightlifting Fairy Kim Bok Joo'

Being the leading lady in "Weightlifting Fairy Kim Bok Joo," Lee Sung Kyung had to gain some weight for her character. The actress portrayed a weightlifting athlete in the drama, so it wasn't a surprise she had to gain extra pounds as Kim Bok Joo.

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The model and actress expressed how she worked hard to create a healthy image. According to the production team, Lee Sung Kyung gained about 5kg.

Go Ara in 'Reply 1994'

Go Ara received immense praise when she portrayed the character of Sung Na Jeong in "Reply 1994."

In one of her interviews, the actress shared how she was able to gain weight for the drama. She expressed that from the beginning, the director kept telling her she had to gain weight to perfect her character.

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The most weight that she gained was almost 9 pounds, but the character of Na Jeong had a good appetite. So, as the filming continued, she gained about fifteen to eighteen pounds.

Lee Yerim in 'My ID is Gangnam Beauty'

For actress Lee Yerim, she had to gain weight for her role in the popular drama "My ID Is Gangnam Beauty." Her role in this drama is Kim Tae Hee, "the pretty girl if she loses weight."

Since the drama is based on a webtoon of the same name, she had to look as similar as possible to the graphic character. In an effort to resemble the charater perfectly, the actress announced through an Instagram post that she gained a total of 9kg.

Kwak Siyang in 'The Witness'

Kwak Si Yang had to put on 13kg to get into the 80s frame and appear more intimidating and threatening as a criminal in the movie "The Witness." However, due to his high calorie intake, he felt like his knees were already hurting. Since then, he has lost 80% of the weight he put on.

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