Harry Styles is ''getting more serious'' with Nadine Leopold.

The One Direction star - who met the Victoria's Secret model in November through her agent, Jeff Azoff - has reportedly started dating the 21-year-old model.

A source said: ''Harry has been getting more serious with Nadine.''

The insider also revealed to Us Weekly that they ''aren't exclusive yet'' but they're ''spending lots of time together''.

Another source shared details about the pair's recent meet up to celebrate her birthday.

On Tuesday (06.01.15), the rumoured couple had dinner at Craig's in West Hollywood before celebrating for a second time the next day (07.01.15) at Rande Gerber's Cafe Habana in Malibu, Los Angeles.

Meanwhile, Harry recently sent the rumour mill flying when he implied he would be happy dating men.

The 'Steal My Girl' hitmaker and his band mate, Niall Horan, were asked about dating men, to which Harry responded: ''Hey, don't knock it 'til you try it.''

The week before, the band - which also includes Liam Payne, Louis Tomlinson and Zayn Malik - were all asked about what they look for in a potential partner.

Liam stated: ''Female, it's a good trait.''

But Harry then added: ''It's not that important''.