Ed Sheeran has revealed that One Direction star Harry Styles doesn't imbibe alcohol when in the US.

The singer is more than a year under the legal public drinking age in the States and Sheeran said that he has never seen Styles drink at all in the US, even when not in bars.

He told the Metro: "Harry Styles doesn’t drink in America. He’s 19, isn’t he? If I’m being totally honest I’ve never seen him drink in America and that’s not me being politically correct. He’s come round my flat and I’ve had a Corona and he’s had a diet coke."

The '+' star, who has spent much of 2013 touring with Taylor Swift in North America, added:

"I drank a lot in America and I’m having a teetotal rest of the year."

Sheeran meanwhile recently revealed he had to whittle down 70 songs to just 12 as he prepares to record his next album.