He has dated some of the most beautiful women in the world and has legions of female fans but it looks like Harry Styles is saying goodbye to his Casanova ways.

The One Direction star has reportedly given up sex after becoming a follower of the popular celebrity Kabbalah religion.

According to the Daily Star, the 20-year- old wants to walk a more spiritual path so he can finally find true love and experience a meaningful relationship.

"Harry is really serious about this. He feels he doesn't want to be that guy who is known for bedding celebs any more. But in the past all his good intentions to quit sex have fallen by the wayside," an insider said.

"He feels it's getting in the way of him having a proper, meaningful relationship and Kabbalah is giving him the discipline to finally quit sex for a sustained period."

Kabbalah, a branch of Jewish mysticism founded in the 13th century, has attracted celebrity followers including Ashton Kutcher, Britney Spears, Paris Hilton, Mischa Barton, Roseanne Barr and Rosie O'Donnell in recent years.

Earlier this month, Styles was pictured wearing the trademark red Kabbalah bracelet - a thin red string with a small charm - on his left wrist during One Direction's final UK concert for their Where We Are tour at London's Wembley Stadium.

"He used to be the big party boy but now he's totally obsessed with spiritual balance and finding inner peace," the source explained.

"A lot of his music industry pals in America are into it too, so he's getting loads of advice from them."

Styles has previously dated the likes of Xtra Factor host Caroline Flack and country songbird Taylor Swift.