Mills was born in 1969 in Colwyn Bay, a coastal town in northern Wales, and moved with his brothers Barnaby and Oliver and his parents Gani and Christopher to Perth, Western Australia when he was three.

[2] In 1984 Mills discovered spray-paint and painting in the streets,[3][4] and at 16 years of age he travelled back to Wales to live with his grandmother before visiting New York in 1986.

When I went to New York in 1986, I met a bunch of guys that were subway painters and I saw the work of Jenny Holzer and John Fekner.

[7] In 2009, together with Timid, Remi/Rough, System, Juice 126, Derm and Burial, Mills travelled to the west coast of Scotland to transform an abandoned village,[4][9] Polphail near Portavadie.

[11] In July 2013 Mills was invited to paint works for Art Whino's Richmond Mural Project in Virginia, USA.