Music mogul Simon Cowell is keen to line up Harry Styles as a mentor on singing competition X Factor.

Styles has become the top choice after his debut single and album both topped the charts, reports

"Everyone is in agreement that Harry would be a ratings winner. His chart positions clearly show he is set to become the biggest solo star from One Direction. Not only does he seem to be a clear fans' favourite he's also being hailed by music critics as well.

"Nothing has been signed yet but Cowell and Co want to make it happen if schedules allow," a source said.