They announced their engagement in August 2011 (Kim reportedly turned down a movie role to prepare for her upcoming nuptials),and subsequently released pre-wedding photos. Their minimalist invitation was made from environmentally friendly paper, and had the number 1,825 written on it, the exact number of days the two had spent together as a couple. They were married at the Shilla Hotel in Seoul on December 2, 2011. The date marked the couple’s fifth anniversary together, and was booked by Yoo one year in advance despite landing on a Friday – an unusual day for a wedding. The ceremony was officiated by the president of World Vision Korea; Yoo and Kim then donated a portion of their monetary gifts to the organization to help build an elementary and middle school in Myanmar. Kim gave birth to their first child, a son, on July 5, 2014. Kim adheres to a vegetarian diet for ethical and health reasons.