IMx, originally known as Immature, is an American R&B boy band formed in Los Angeles, California, in 1991. The group consists of Marques "Batman" Houston, Jerome "Romeo" Jones, and Don "Half-Pint" Santos, with Kelton "LDB" Kessee joining later to replace Santos. Immature released their debut album On Our Worst Behavior in September 1992, which included the single "Tear It Up (On Our Worst Behavior)". The group signed with MCA Records and released subsequent albums Playtyme Is Over in August 1994, featuring the hit single "Never Lie", We Got It in 1995, and The Journey in 1997. In 1999, the band changed their name to IMx and released Introducing IMx, which included the single "Stay The Night". They continued with another self-titled album IMx in August 2001 under TUG Entertainment and New Line Records. Throughout their career, Immature/IMx appeared in films such as House Party 3 and House Party 4: Down to the Last Minute, and television shows like A Different World and Sister, Sister. The group disbanded in 2002. In November 2013, they reunited for a performance at Club Nokia in Los Angeles, and in September 2019, announced their #TBTour with special guests Ray J, B5, and J. Holiday.
