Harry Styles is spending a lot of time with model Nadine Leopold that it's sparking dating rumors.

However, Us Weekly said that they are still seeing other people.

"Harry has been getting more serious with Nadine," the source told the magazine.

"The insider adds Leopold and Styles aren't exclusive yet, but they're 'spending lots of time together,'" it added.

The One Direction singer and the Austrian model started dating in November last year after meeting through her agent Jeff Azoff.

On January 6, Harry Styles and Nadine Leopold went out to dinner at Craig's in West Hollywood. A day later, they marked her birthday in Cafe Habana, Grande Gerber's restaurant.

"He planned a few activities for her birthday," the source said.

Meanwhile, another source claimed that Harry Styles is also dating other women apart from Nadine Leopold.

"Harry is having a good time being a young rock star. You will know he has a girlfriend when he steps out on the red carpet with one. Until then, he's having fun and enjoying life," the insider added.

The Daily Mail claimed that Harry Styles and Nadine Leopold were first to be reported dating when they were snapped in December while walking around New York.

"The following morning, Harry was seen out and about with his agent - wearing a Calvin Klein jumper and sheepskin coat - a few hours after Nadine was reportedly seen leaving his apartment," it said. "He and Nadine were seen together grabbing a coffee in Starbucks the day before and fans were quick to share snaps of them standing next to each other on Twitter."

Prior to Nadine Leopold, Harry Styles was linked to other women including Taylor Swift,
"Keeping Up with the Kardashians" reality star Kendall Jenner, British supermodel Cara Delevingne, and TV presenter Caroline Flack when he was just 17 years old and she was 32.