Justin Bieber has opened the door for a blockbuster collaboration with One Direction.

Talk of a pairing between the two has been raised in the past, with Bieber previously praising the British boyband.

Speaking to BBC Radio 2, Bieber said that they have all "hung out" in the past at his own swimming pool.

And he added that they just need to ask if they want him to record with them. He said:

"They're my boys. They came to my house, we hung out. I have a pool so we all went in and chilled out."

He continued: "If they want me on their album, they just have to ask. They're talented."

Watch Justin Bieber's 'Boyfriend' below: