An upcoming fantasy romance "Beauty Inside" (literal translation) will star 21 stars as a single character.

The star lineup includes actors Yoo Yeon-seok and Park Shin-hye, among 19 other high and low-profile stars, who all enact the main character Woo-jin.

Woo-jin, as the main character, takes on a completely different form -- ranging from male, female, old, young and a range of nationalities -- every time he wakes up from sleep.

Actress Park Shin-hye (NEW)

Actor Yoo Yeon-seok (NEW)

In order of appearance, the 21 actors are -- Kim Dae-myung, Do Ji-han, Bae Sung-woo, Park Shin-hye, Lee Beom-soo, Park Seo-joon, Kim Sang-ho, Chun Woo-hee, Juri Ueno, Lee Jae-joon, Kim Min-jae, Lee Hyun-woo, Jo Dal-hwan, Lee Jin-wook, Hong Da-mi, Seo Kang-joon, Kim Hee-won, Lee Dong-wook, Go Ah-sung, Kim Joo-hyuk and Yoo Yeon-seok.

"Beauty Inside" follows the romantic tale between Woo-jin and his female love interest Yi-soo, played by Han Hyo-joo.

21 stars will portray a single character Woo-jin -- who wakes up with a completely different appearance each time. (NEW)

The film has already been introduced to buyers at the ongoing Cannes Film Festival this year.

"This romance film will be completely different from what viewers have seen before and has already received positive attention," said film distributor NEW. "Buyers have not only inquired after the film, but have also initiated talks over a possible remake."

"Beauty Inside" is scheduled for release in Korea in July.

By Yoon Sarah (sarah356@heraldcorp.com)