• Song Hye Kyo, Iris Law and Immy Waterhouse wearing Burberry attend the Burberry February 2017 Show during London Fashion Week February 2017 at Makers House on February 20, 2017 in London, England.

Song Hye Kyo, Iris Law and Immy Waterhouse wearing Burberry attend the Burberry February 2017 Show during London Fashion Week February 2017 at Makers House on February 20, 2017 in London, England. (Photo : Getty Images/David M. Benett)

Song Hye Kyo, 35, who starred in "Descendants of the Sun" opposite Song Joong Ki, 31, and "Six Flying Dragons" alum Yoo Ah In, 30, are in a relationship, a platonic one. Hye Kyo and Yoo recently graced the cover of a South Korean magazine together.

Yoo is set to star in an upcoming tvN series titled "Chicago Typewriter" opposite Go Kyung Pro and Im Soo Jung. He and Hye Kyo are the cover models of the special March issue of W Korea, which is celebrating its 12th anniversary.

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In an interview with the magazine, Hye Kyo was asked about her optimism when it comes to love. She said she is quite optimistic about doing her best in love as she gives her all when she is in a relationship.

Currently, Hye Kyo is single, contrary to the rumors that she and Joong Ki are dating. The lead stars of "Descendants of the Sun" are not dating anyone at the moment.

The first actor to be romantically linked to Hye Kyo is her "All In" co-star Lee Byung Hun. The two dated from 2003 to 2004.

After playing Billy Rocks in "The Magnificent Seven," Lee will star with Jack Campbell, Benedict Hardie, Sohee and Kong Hyo Jin in "A Single Rider." Lee recently told Korea Herald that the "A Single Rider" screenplay was among the top five best scripts he had ever read.

After breaking up with Lee, Hye Kyo dated her "Worlds Within" co-star Hyun Bin, which they confirmed in 2009. In 2011, the respective agencies of Hye Kyo and Hyun confirmed that the two had broken up.

Hye Kyo will star in the romantic drama film "Ships Passing in the Night" opposite Esther Nam and Dae Na after "Descendants of the Sun." Here is a video of one of Hye Kyo's moments on TV: