The announcement of Song Hye-kyo and Song joong-ki's marriage was rather a sudden one which both shocked and delighted fans of the couple all over the world. Anticipating such emotions, the engaged couple has separately written letters directly to their fans, explaining the reasons behind the hush-hush nature of their relationship and seeking their blessings.

Website Koreaboo posted the two letters written by the 'Descendants of the Sun' co-stars in their entirety, translated into English from the original Korean.

Song Hye-kyo wrote to her fans saying, "You were probably surprised by my sudden wedding news. I understand that you may think I lacked the respect for my fans and that you could have been shocked, but I hope you can understand me with an open heart."

She then narrated how her relationship with Song Joong-ki evolved from friendship to love. "Joong-ki and I were first co-workers who matched well. Throughout the project, I realised that we had similar values and ideas, and I was able to share everything with him," adding "He was such a good co-worker and friend to me, so we contacted frequently and spent time to get to know each other better."

We recently learned that it was Song Joong-ki's sincerity that ultimately won Hye-kyo's heart. Song Hye-kyo admitted that saying, "Joong-ki showed me his self, trust, and his manners for a long time. I thought to myself that it would be good to spend the future with him and I was glad that he could feel my true emotions as well. That's when I knew that he was the one."

As for the secrecy surrounding their relationship, Hye-kyo said, "I wanted to let my fans know first about the marriage but since this matter involves more than just me, I was extra careful about it."

She ended her letter by thanking her fans and seeking their blessings.

Song Joong-ki in turn revealed how he fell in love with his wife-to-be on the sets of 'Descendants of the Sun,' saying, "I was recently able to be part of a drama that made me shine brighter than ever before and I enjoyed the happiest days of my life because of your tremendous love I received from everyone. After the drama, I gained another precious friend who I shared my honest feelings with, and we developed a loving relationship."

He added, "At the start of 2016, we promised to spend the rest of our lives together by understanding each others' weaknesses and helping each other through harsh times. So I will be starting a new life with Miss Song Hye-kyo through our wedding on the last day of October 2017."

Song Joong-ki also revealed that because he was recently working on the movie 'Battleship Island,' he didn't want to divert attention from that or harm the production unwittingly, hence the late announcement. He also talked at length about some lessons he learned about life from acting and how he will work towards becoming a strong family man. He ended his letter seeking support from fans for the both of them.

The couple have a wedding date set for October 31, this year.