Cleo (Korean: 클레오) was a three-member South Korean girl group, formed in 1999. They were one of the original Korean idol girl groups and were active at the same time as Fin.K.L and S.E.S. Their debut song "Good Time", from their first studio album, was very successful.
The group's second album, released in 2000, was also successful and included the songs "Ready For Love", "Always in My Heart", and "Mosun". Cleo's third album, which included the song "Triple", was released in 2001. Their fourth album was released in 2003, included the tracks "Donghwa" and "S.P.Y". Their fifth album, Rising Again, was released in 2004 and included the song "In and Out". The group disbanded in 2006.