Paris and Nicky Hilton used to have a "dollhouse with rodents" when they were kids

Speaking about their unusual idea of fun during their childhood, Nicky said: "We liked rodents: hamsters, guinea pigs, mice ... all rodents, it's very strange looking back now."

Whilst Paris added: "Yes, we took them to our home in Bel Air, California. There we had a huge dollhouse, it had a living room, bedroom and kitchen. There was also water and electricity. It was gorgeous. We hid them there, so we didn't upset our parents, who knew nothing about it."

Paris and Nicky have always been close and are never "competitive" with each other.

Talking about their sibling bond, Paris shared: "We have never actually been competitive with anyone. We have always wanted the best for us, for our friends, for everyone in the world. And I think this is a wonderful way of being: because what you give, you receive. And I'm very lucky, my sister is also my best friend, I don't know what I would do without her ...

|When we were little, our mom would dress us as twins, we had double outfits, until we became teenagers, and I started fetching clothes from Nicky's closet. But we were different, I've always been more tomboy, and Nicky more girly, growing up."

And Nicky confessed the pair rarely clashed, except when they shared clothes.

She added to the new issue of L'OFFICIEL magazine: "We were like all teenagers are, we took clothes from each other's closet, and maybe that was the only reason for the two of us to clash."