Cindy Crawford is jealous of her 10-year-old daughter's youth.

Kaia Gerber recently made her modelling debut in a Versace kids campaign and while mum Cindy, 46, was undoubtedly proud, she admits to feeling slightly envious.

Asked about her feelings on the ageing process, the supermodel told the Daily Mail newspaper: ''Oh, please. I am a normal woman, I have good days and bad days and it's not really that fun.

''I look at my daughter and I'm like, 'You have my old skin and I want it back! You have my old legs, I want them back! You have my old hair, I want it back!'

''She is just getting more and more beautiful and, you know ... But at the same time, there's so much good that comes with it. And I think if you're happy in your life, it's a lot easier to take.''

Meanwhile, Cindy - who also has son Presley, 12, with husband Rande Gerber - admits her troubled relationship with dad John Crawford has affected her ability to trust.

She explained: ''There have been times when I haven't really been in a place where I wanted him in my life, but it's not like I didn't know how to get hold of him.

''It was really hard for me when he left my mother. So I was mad at him. And then, I think, especially for a teenage girl, that's hard.

''In some ways, that really affects your relationship with men further on, because maybe you don't trust as much.''