(CNN)Korean superstar actors Song Hye-kyo and Song Joong-ki have stunned millions of fans by announcing their divorce. The pair played lovers in the wildly popular romance television series "Descendants of the Sun" in 2016, before starting a real-life relationship. They earned the joint nickname the "Song Song Couple" and were widely seen as Asia's answer to American A-list pairings like Brad Pitt and Angelina Jolie.