Olajide "JJ" Olatunji (born 19 June 1993), better known as KSI, a shortened version of his YouTube username KSIOlajidebt (stylised as KSIOlajideBT), is an English comedian, YouTube personality, rapper, and occasional actor. He is best known for his YouTube channel, which has, as of 2 January 2016, reached over 11 million subscribers. The pseudonym "KSIOlajideBT" comes from a gaming community he was in (KSI), his real name Olajide, and BT British Telecom, according to his website. His videos mostly consist of FIFA gameplay/commentary, whilst playing other games on various platforms with the occasional vlog. He has also appeared on a few of different shows such as BT Sport where he played FIFA with England and Arsenal midfielder Alex Oxlade-Chamberlain.