Harry Styles and Taylor Swift

One Direction star Harry Styles reportedly cheated on singer Taylor Swift during a fleeting romance earlier this year by kissing American model Emma Ostilly.

According to Metro UK, the 18-year-old 1D heartthrob was dating 22-year-old Swift before he got into "a steamy clinch" with 18-year-old Emma in April.

'Taylor really liked Harry and even though they weren't exclusive, he hinted at making it official with her just before he took off to Australia,' an insider revealed.

'He even told Taylor he didn't want her to see anybody else while he was gone!'

'Taylor had her love goggles on and didn't care what anybody had to say about Harry,' the source added.

'Taylor had all these texts from Harry begging for a chance to explain and telling her not to believe everything she reads," said the source.

'She immediately Googled Harry and found all the stories and pictures of him kissing Emma. She was heartbroken.'

Taylor Swift recovered from the betrayal and is now dating Conor Kennedy.