Kay was born and brought up in the Farnworth area of Bolton, Lancashire, where he attended Mount Saint Joseph School, leaving with one GCSE in art. His father, Michael, was an engineer who died just before Peter's career took off. His mother, Deirdre (née O'Neill), is an Irish Catholic originally from Coalisland, County Tyrone, and Peter was brought up in her faith. He took several minor jobs, including working in a toilet roll factory, a Netto supermarket, Manchester Arena, a cash and carry, a cinema, a petrol station and a bingo hall, which later inspired episodes for "That Peter Kay Thing".