Victoria Beckham is on a waistline-expanding diet in a bid to get pregnant.

The former Spice Girl – who already has three sons, Brooklyn, 11, Romeo, seven, and five-year-old Cruz, with her soccer superstar husband David – wants to add a daughter to her family and has taken up a new eating plan loaded with carbohydrates to achieve her dream.

The 35-year-old star – who is known to predominantly eat fresh fruit and vegetables and steamed fish to maintain her slender figure – has been munching on pasta dishes, brown bread, rice and meals which include potatoes.

A source told The Sun newspaper: 'It's no secret Victoria and David want a little girl. She's been told by docs her diet, though healthy, would not give her the best chance of conceiving, particularly in her 30s.

"Instead she has been advised to eat a lot more carbs and fatten up. She has agreed and David is over the moon.'

Although Victoria has agreed to overhaul her diet to conceive again, she won't be gorging on any foods which are too calorie laden.

The source added: 'She draws the line at junk food."

In February, it was reported Victoria had become broody for a baby girl after her younger sister Louise announced she was expecting her fourth child.

A source close to the family said at the time: "Louise has just told everyone she is expecting and Vic has immediately become broody. She and David have always wanted a girl. He'd love more kids.'