The BTS member was born on September 12, 1994, and this year, he's turning 23-years old.
Thousands of fans around the world are leaving congratulatory messages for the idol star on Twitter with the hashtag #HappyNamjoonDay, which has quickly become a worldwide trend.
Big Hit Entertainment also shared an adorable birthday cut of Rap Monster for the special day.
Happy Birthday, Rap Monster!
┏┓— suga pics (@SUGAPlCS) September 11, 2017
┃┃╱╲ in this
╱╱╭╮╲╲ we love
▔▏┗┛▕▔ & support