Kelly Osbourne credits her vegan boyfriend for her super-slim figure.

The 27-year-old star has shed a huge amount of weight over the past two years and says meeting Matthew Mosshart gave her the push she needed to lose the final kilos thanks to his healthy cooking.

"Over the past two years, I've lost over four-and-a-half stone (28kg) - but I've only lost the last stone since I met Matthew. That's because he cooks for me.

"He's a vegan chef, so he makes sure that I eat healthily."

Osbourne has swapped dairy, meat and fast food for a diet rich in vegetables, fruit, nuts and seeds and is also committed to a rigorous exercise regime.

This combination, which she and Mosshart follow, has resulted in Osbourne being the healthiest she has ever been.

"I'm happy with how I look now. As long as I'm healthy, do exercise and eat right, that's the main thing.

"I'm slim now, but I don't want to be anorexic. I love Matthew and we love to work out together - we motivate one another. I go on the treadmill every day for half an hour and do two hours of exercise if I have a special event."