Harry Styles has had a slew of girlfriends these past couple of years, but could he finally be getting serious with someone?

The One Direction singer has been spending a lot of time with Nadine Leopold and he is rumored to have tattooed her initials on him, next to his own initials.

There has been no photo proof of the tattoo, but The Mirror reports after his 21st birthday party in LA on Sunday, they visited the tattoo parlor.

A source told the Daily Star, "Harry made everyone sign confidentiality agreements so the girl's letters are a secret at the moment, 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.”

Styles has multiple tattoos and this wouldn’t be the first time he got the name of a woman in his life tattooed on his body. He has his sister Gemma’s name in Hebrew on his chest and his mother’s initials on the inside of his elbow.

Leopold is a Victoria’s Secret model.

image via INFphoto.com