Teen Teen (틴틴) was a South Korean boy band formed by Maroo Entertainment in 2019. The group debuted on September 18, 2019, with Very, On Top.

The unit effectively disbanded following Taeseung's departure from GHOST9.

Before debut, all members participated in Produce X 101 representing Maroo Entertainment, Lee Jin-woo finished in 22nd place, Lee Woo-jin in 41st and Lee Tae-seung in 53rd.^{[citation needed]}