Ibrahim ibn Awwad ibn Ibrahim ibn Ali ibn Muhammad al-Badri al-Samarrai more well known by war his name Abu bakr al-baghadi is the leader of the Islamic State, whom they proclaimed as their caliph.
After being released from camp Bucca in December 2004 he and his group joined the Muhidjeen Shura Council two year later. It was later renamed the Islamic State of Iraq. In 2010 he was proclaimed it's leader in 2014 Abu Bakr was proclaimed their caliph.