Lee Jae Jin is a South Korean musician and actor who is best known as a member of the rock band FTISLAND and its subunit FT Triple. Born on December 17, 1991, Lee Jae Jin debuted with FTISLAND in 2007. He is the bassist and second vocalist for FTISLAND and the guitarist for FT Triple. He also composed many of the group’s songs. Lee Jae Jin made his acting debut in the 2007 television drama “Unstoppable Marriage.” He also starred in the web drama “The Flatterer” (2015).