Harry Styles inked with new gf's initials?

Harry Styles has apparently had his new girlfriend's initials inked on to his skin.

The One Direction hunk is no stranger to tattoo parlours, with numerous pieces of art adorning his body.

And it seems he's so serious about alleged new squeeze Nadine Leopold, he decided to add her name to his burgeoning collection of skin ink.

"Harry made everyone sign confidentiality agreements so the girl's letters are a secret at the moment," a source close to LA's Shamrock Tattoo Parlour told British newspaper Daily Star.

"But he had two sets of initials together – 'HS' is one of them of course, but everyone's saying that the other initials are 'NL' – for Nadine Leopold."

Harry and Victoria's Secret model Nadine were first linked in December and it's thought the blonde beauty was on hand to celebrate Harry's recent 21st birthday.

Because of One Direction's global fame, the source reveals that Harry couldn't go to the tattoo shop in person, as too many fans would show up. Instead he got the tattooist to ink him in private.

"Harry used to go to tattoo parlours when he came to LA. But he gets mobbed so much that he has an artist go to his house instead," the insider said.

If Harry has had Nadine's initials added to his skin the tattoo will sit alongside his other works, including a big black heart, HMS Victory and a large butterfly on his torso.

Those close to the singer say he's totally smitten with his rumoured new love interest.

"Everyone's teasing Harry, saying he's in love, and he's not denying it. It's the real deal. He's never felt this way about anyone before. Harry has spent virtually all his free time in Los Angeles with Nadine. They're infatuated with each other and can't stand being apart," a source recently told inquisitr.com.