Sebastian Ingrosso (born Sebastian Carmine Ingrosso) was born on April 20, 1983 and grew up in Sweden. He works closely with his childhood friend, Steve Angello, as well as Axwell in a three person DJ group. They began calling themselves the Swedish House Mafia as a joke, but the name stuck, and became official. Eric Prydz was part of an earlier version of the group, and while they all remain friends, Prydz has left the group to pursue his own projects. Angello, Ingrosso, and Axwell collaborate on many projects, sometimes all together and sometimes with only 2 of the 3 members contributing.