Niall Horan has split from his girlfriend Barbara Palvin.

The One Direction hunk, who has been dating the Hungarian model since December last year, is single again after the pair found it difficult to make their relationship work due to their hectic work schedules.

"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," a source said. The insider added that they are "still in touch and friendly" and simply found it hard to see each other while Niall, 20, was in Britain recovering from major knee surgery and Barbara, also 20, continued to travel the globe with her work as a Victoria's Secret model and L'Oreal ambassador.

The stunning brunette, who is based in Paris, confirmed she had split from Niall by posting a romantic photograph of herself and a new secret guy on her Instagram account, clutching a bunch of flowers. It was accompanied by the caption, "Early Valentine."