One Direction heartthrob Harry Styles has revealed that he's overwhelmed by the success his band has enjoyed over the past 4 years and took to his official Twitter page this afternoon (April 11) to thank fans for the constant support. 

Writing on the social networking site, Styles explained that without Directioners they wouldn't have such an incredible career so he's very grateful to them for always being there: 

"Thank you for everything the last 4 years... Couldn't be more amazed by what you've done for us. H xx"

Last night, the 'Story Of My Life' superstar confessed that he can't wait for One Direction's Where We Are tour to kick off and tweeted: "Tour nearly ready.. Looking forward to getting on the road."

It has also now been confirmed that 'You & I' will serve as the lads' forthcoming new single and it's due to be released on May 25. Fans will be able to pre-order the track from next Monday, which is April 14. 

Watch the boys announce their new single below: