X1 (엑스원) is an eleven-member project boy group a group under Swing Entertainment and Stone Music Entertainment. They were formed through Mnet's competition reality show Produce X 101 and are set to debut on August 27, 2019 with their first mini album 비상 : Quantum Leap.
They will be active for five years on a special contract, where the first semester is intended for them to focus solely on the group, and in the second half they will be able to do work within their own companies, such as solo debut, a member of a new group or returning to work with a former group. They will disband sometime in 2024.
|1||Kim Yo Han (김요한)||Lead Rapper, Vocalist, Center|
|2||Kim Woo Seok (김우석)||Lead Vocalist|
|3||Han Seung Woo (한승우)||Leader, Main Vocalist|
|4||Song Hyeong Jun (송형준)||Lead Rapper, Lead Dancer|
|5||Cho Seung Youn (조승연)||Main Vocalist, Lead Rapper|
|6||Son Dong Pyo (손동표)||Lead Dancer, Vocalist|
|7||Lee Han Gyul (이한결)||Main Dancer, Lead Vocalist|
|8||Nam Do Hyon (남도현)||Main Rapper, Maknae|
|9||Cha Jun Ho (차준호)||Lead Vocalist|
|10||Kang Min Hee (강민희)||Lead Vocalist|
|X||Lee Eun Sang (이은상)||Vocalist, Visual|
- 비상 : Quantum Leap (2019)
- Kim Woo Seok is a member of UP10TION.
- Han Seung Woo is a member of VICTON
- Cho Seung Youn is a member of UNIQ.
- Lee Han Gyul is a member of IM.