Niall Horan regrets leaving school without any qualifications.

The 21-year-old singer quit education aged 16 when he shot to fame on 'The X Factor' with One Direction, but the star admits he would've like to have had more of a childhood by remaining in education and finishing his exams.

Writing in the boy band's latest autobiography, 'Who We Are', he penned: ''My childhood was cut short by 'The X Factor' because One Direction took off and I never really got the chance to finish school or do my exams or anything like that.

''After the first audition, I packed up everything in my life in a bag.

''I didn't realise at the time that, when I was stuffing clothes into the little suitcase, that was pretty much me leaving home for good.''

While Niall admits he enjoyed his school days, he wasn't always a model pupil as he previously revealed he was suspended from strict Catholic boys school Coláiste ­Mhuire in Mullingar County, Ireland.

He said: ''I maybe stole something when I was at school, like stuff off a friend.

''I was not a bad boy but I got suspended for two days for general messing about. I talked too much which probably got me in trouble.''