One Direction's upcoming 3D film is set to give an unprecedented behind the scenes look at the group's life - possibly even covering some of their trips to the toilet.

The boyband are currently working on their debut film 1D In 3D, which is due for release in August.

Cameras have been rolling for some time and they are showing no signs of letting up as One Direction continue their quest for world domination.

Speaking to the Mirror at last night's (February 20) BRIT Awards, Niall Horan revealed that the cameras had just been in the bathroom with them. He said:

"We're shooting the movie tonight. It's actually just been in the toilet with us. It's going to be very access all areas."

Liam Payne meanwhile interjected: "Especially in the toilet"

Horan then added: "That's something to look forward to."

One Direction meanwhile performed their Comic Relief single 'One Way Or Another (Teenage Kicks)' at the BRITs.