Russell Brand admits caring for a kitten is preparing him for parenthood

Russell Brand has revealed the real reason why he adopted a kitten with his fiancee Katy Perry - the pet is preparing the couple for parenthood.

The pair, who will marry in October, recently purchased a baby cat, who they have named Krusty, and the British funnyman admits looking after the young creature is helping them hone their parenting skills.

He tells Britain's Radio Times, "That's why we've got a kitten. It's perfect training for having kids. Since being with Katy, I've got this masculine urge to protect."

He added: "It's lovely this kitten but it's got no concept of moderating its conduct. It just climbs all over my head."

Russell Brand wants a passport for cat to visit girlfriend Katy Perry

Russell Brand wants his little kitty, Morrissey, to be able to travel with him to the States to visit his latest squeeze Katy Perry.

Asked whether he had resettled in Hollywood, Russell, 34, said: "I would never do that because the cat lives here, my cat, and someone has got to feed him... You can't just send him the occasional postcard saying things are going well - I've got to look after him."

He continued jokingly: "He hissed at me yesterday. I tried to explain to him but he doesn't understand concepts such as international travel and work. He certainly doesn't understand the concept of a bikini."

The comedian told GMTV: "I am getting him a pet passport which means he can travel around as much as he likes. Unfortunately, they don't do photos. I was really looking forward to that."

Forgetting Sarah Marshall actor Russell has been dating I Kissed A Girl star Katy since September. Yesterday, he was puckering up to presenter Lorraine Kelly under the mistletoe on the GMTV sofa.

He joked of his former womanising: "There was a deep craving within me. I mistook it for lust. I thought I was promiscuous. It turns out I was thorough. 
"I'm happy. It's really nice and relaxing (being in a relationship)."

Russell has previously hinted that he could be ready to tie the knot, saying: "I'd love to marry Katy - hopefully it's heading that way." Today he said on marrying: "I don't know. That would be good. I do want to have children."