Fazer, real name Richard Rawson, told UK magazine Heat that he wants to have children with the 23-year-old singer in the future.
He said: 'We'll definitely have kids one day. I've always wanted children for as long as I can remember. You can just imagine them running around your feet like Mini-Me's.'
He added that in the meantime, they’re happy to practise their parenting skills by looking after fellow band member Dappy's two kids.
'It's great because Dappy has Milo and Gino, so we can just play with them, then give them back when they get a bit annoying. It's definitely something I want one day, though,' he said.
Speaking about the increased level of attention his girlfriend’s been getting from men since she joined the X Factor’s judging panel, the 24-year-old musician says he takes the potential competition as a compliment.
He said: 'I love it that guys fancy her. It’s far better than them saying, ‘Fazer, what the f*** are you doing with her?’ It’s good.'