Yook Sung-Jae is a South Korean singer, entertainer, composer, and actor. He is also known as Sungjae. He was born in Yongin, Gyeonggi Province, South Korea, on May 2, 1995. He has two sisters, one younger and the other older. Yook is from a business-oriented family. He may have developed his acting and K-pop idol talents while at Hanlim Multi...