There are more than one artist using the name B.I.G. 1) B.I.G (Hangul: 비아이지; an acronym for Boys In Groove) is a five-member South Korean boy band under GH Entertainment. The group consists of Benji, Gookminpyo, J-hoon, Gunmin and Heedo. 2) Dimos and Michalis Siavelis, 29 and 27 years old respectively, started off with the best possible foundations, which is classical music, and from there managed to enchant us with their electronic compositions! Apart from their 11-year studies in music, both have excellent knowledge of the piano.