Niall Horan has split up with his girlfriend.

The One Direction hunk has been dating Hungarian model Barbara Palvin since December last year, but he called time on their relationship recently after the work schedules became too much.

A source told The Sun newspaper: ''There was no big fall out, things just fizzled out as Niall and Barbara are both working in different parts of the world.

''They are both really busy and Niall is focused on recovering and getting ready for the band's massive Where We Are tour.''

However, the former couple are reportedly ''still in touch and friendly''.

The stunning brunette, who is based in Paris, confirmed she had split from Niall by posting a photograph of herself and a new secret guy on her Instagram account.

In the photograph, she can be seen clutching a gorgeous bouquet of flowers, and she accompanied the snap with the caption, ''Early Valentine''.

The Irish star and his band mates - Harry Styles, Zayn Malik, Liam Payne and Louis Tomlinson - are currently on a three-month break after touring the world.

Meanwhile, Barbara is also busy trying her hand at acting and recently secured a role in 'Hercules: The Thracian Wars', which hits screens later this year.