Russell Brand and Katy Perry want a Bieber

Russell Brand and Katy Perry want their own little Justin Bieber.

The couple, who got engaged in December, are big fans of the teen singing sensation, and have joked they even have a plan to grow their own version of him.

Comedian Russell, 34, told E! TV show 'Daily 10': "Me and my fiancee love him. We want our own Justin Bieber. We can't have the actual one because he's busy with his work.

"I understand he procreates by laying eggs in the sea and then we can fertilise these eggs and have our own Justin Biebers. We could grow Justin Bieber in a jar like sea monkeys."

The 'Get Him to the Greek' star is even jealous of 16-year-old Justin's other celebrity fans.

When told that Kim Kardashian had "Bieber fever", Russell joked: "What? My little Justin?

"Keep away, Kim. I'll neutralise you with my doctor mitts!"

Though Katy is a self-confessed Bieber fan, she has been less kind when it comes to fellow pop star Lady Gaga, following the eccentric singer's religiously symbolic video for her latest single 'Alejandro' – which the Catholic church has dubbed "decadent" and "abusive".

Katy – who parents Mary and Keith Hudson are both Christian pastors - tweeted: "Using blasphemy as entertainment is as cheap as a comedian telling a fart joke."