Korean actress Song Hye-kyo admitted that her “Descendants of the Sun” co-star Song Joong-Ki makes her “heart leap.”

During a news conference at a hotel in Seoul, Song Hye-kyo said: “His acting was so good it actually made my heart leap,” Korea’s yonhapnews.co reported.

The actress’ character in the series is female surgeon named Kang Mo-yeon, who got involved with Special Forces Capt. Yoo Si-jin in the fictional war-torn country of Uruk. In the story, Yoo is part of South Korea’s peacekeeping force, while Kang is a volunteer for a medical relief NGO.

“I thought the male protagonist’s role was really important for the show’s success, and he accomplished that difficult job.  His acting was so good it actually made my heart leap,” Song Hye-kyo said.

She also called her co-star a “perfect leading man,” AsiaOne wrote.

“I’ve been in the industry for quite a while now, and I see a lot of junior actors who aren’t like him. (Song) works hard at whatever he does, even with all his fame. … He did everything a male lead should do perfectly. He is a great guy.”

The two have been rumoured to be dating in real life after they were seen dining out together with friends for several times.

Meanwhile, despite the success of her show, Song Hye-kyo said there will be no drastic change in her career.  “I don’t think there will be a turn in my path of life because of the latest success. I will continue to read screenplays and choose act in one I like,” she said.

The 16-episode “Descendants of the Sun” series concluded last week with a stunning 38.8% viewership when it aired simultaneously in South Korea and China. However, the possibility of season two is currently off the table. .

“Season 2 would be nice, but I don’t know about its possibility,” Lee Eung-bok, “Descendants of the Sun” producer, told Yonhap News. “We’d have to keep all the main cast, whose schedules won’t be easy to coordinate. We’d also need the two writers again, and that might be hard,” he added.