How old is Jaemin? His birthday falls on August 13, 2000. He is 20-yrs old. His zodiac sign is Leo. He was born in Jeonju, South Korea. He holds Korean nationality and belongs to mixed ethnicity. He grew up in Seoul and studied at Incheon Cheong-il Elementary School. He became a trainee under SM Entertainment in 2013, at the age of 13. NCT DREAM is a South Korean boygroup formed by S.M. Entertainment in 2016, a third sub-unit from the main group NCT .The group is composed of seven members: Mark, Renjun, Jeno, Haechan, Jaemin, Chenle and Jisung.Their first single "Chewing Gum" was released on August 24, 2016, along with a Chinese version. On February 1, 2017, >NCT</b> Dream.NCT DREAM.