Niall Horan believes he was the ''worst-dressed man on the planet'' when he was in One Direction.

The 24-year-old singer has claimed he had no sense of fashion when he was in the group, which embarked on a hiatus in 2015, alongside Harry styles, Zayn Malik, Louis Tomlinson and Liam Payne, and despite experimenting with various garments, on reflection, he has realised he was not able to pull off certain outfits.

Speaking to Esquire magazine, the 'Slow Hands' hitmaker said: ''A while ago I was probably the worst-dressed man on the planet. Obviously some people can pull it off, and some people can't. I happen to be one of those people that can't. But I was 16 and 17, so you kind of let yourself get away with that.

''When we were in the band, it was something that I never really thought about. You could obviously tell that Harry was probably into it a little more than me at the time; it was something that he focused on more than I did.''

And one of the items Niall felt did not work for him was the wide brim hat he donned at this year's American Music Awards (AMAs).

He explained: ''To be honest, I thought it was a lot smaller. I didn't realise how big the brim was until I got onto the stage and there were mirrors on either side of the stage. I literally shouted at my drummer, 'Is the brim on this hat too big?' He just said no, obviously, because we were just about to go live on TV.''

Niall has described his style as ''Classic American Irish'' and a nod to his Irish heritage because of the boots and headgear he wears.

He said: ''It's kind of an extension of me being Irish. A lot of boots. A lot of hats. And all different types of jackets--denim, leather, all different types of materials that I'm trying to get into.

''I guess what I'm saying is kind of classic. Classic American rock. They did it pretty good back in the day¬, the '70s and '80s. Bruce Springsteen and Tom Petty and bands like The Eagles, they always looked really cool and really suited to that time. And I think that time in fashion is coming back again.''