Jack Jarupong Kluaymaingam, born in Bangkok, is a singer and actor under XOXO Entertainment. He graduated from Thammasat University's Sirindhorn International Institute of Technology with a bachelor's in engineering management.

Jack was a member of the boyband Nice 2 Meet U before leaving the group in 2008 to continue his studies. After graduating, Jack returned as a solo artist under the name "Black Jack."