It looks like One Direction heartthrob Harry Styles is back off the market.

According to The Sun newspaper, the 20-year-old Best Song Ever singer has rekindled his romance with his model ex-girlfriend Paige Reifler.

The insider said: "Harry turned up specifically to meet up with Paige but they were as discreet as possible at the event.

"Then they both left the main party, which was on the rooftop next to the pool, and went downstairs to the more private restaurant. They were having drinks with her agents.

"But Harry ended up putting his arm around Paige and they were very flirty together. They ended up leaving on their own because there were lots of photographers outside."

The source added: "Harry's been on 1D's world tour lately but it was good timing that he was around.

"Paige is completely smitten with him but realistic that their crazy lives mean it might not be able to develop into anything serious at this stage."