4Men's Kim Won Joo will report for his mandatory military service in November.

On Sunday, Oct. 4, a representative from Happy Face Entertainment confirmed to OSEN regarding Kim Won Joo's enlistment next month.

"Kim Won Joo will enlist on Nov. 10 in Kangwondo Chuncheon's 102th Division. He is currently taking a rest," said the representative, as reported by Allkpop.

4Men is a duo group that consists Kim Won Joo and Shin Yong Jae. The representative further revealed that Shin Yong Jae will do some individual promotions when Kim Won Joo enters the military. There are no scheduled dates as of yet.

Kim Won Joo was previously reported to enlist in September, though it was pushed back for personal reasons.

4Men's latest promotion activity was on June 1, with the release of their music video for "You're My Home."

4Men debuted in 1998 but has had a series of line up changes, with members Yoon Min Soo, Jung Se Young, Han Hyun Hee, Lee Jung Ho, and J1 leaving the group. Kim Young Jae was the most recent to leave in 2014.