One Direction star Niall Horan believes the band haven't gone "Hollywood" yet as they make their debut film.

The boys are scheduled to release their first ever 3D movie in August and a trailer has already been released online.

Horan told BBC Radio 1 that filming for the flick is still taking place - and he revealed that they are still grounded and down to earth despite the constant camera attention. He said:

"We're still shooting at the moment. We forget the camera are there and just go off on a tangent. We''re lucky enough that no-one has gone Hollywood!"

The Irishman also spoke their recent trip to Ghana for Comic Relief, with the 'Kiss You' singer adding:

"It was unbelievable, we had an amazing time. Even before we'd left on the plane to come back to London we asked them could we go back. It was a life changing experience. I don't think people believe how poor these people are until they see it. It was tough to see."