Sarah Jessica Parker shoes

It is thought the couple turned to a surrogate after having trouble conceiving.

Star magazine claims the babies were conceived in vitro using eggs SJP had frozen some time ago and Broderick's sperm.

The publication also says the woman, a 26-year-old divorced mother-of-one, is reportedly receiving $30,000 (£20,300) to carry the twin girls for the A-list couple.

According to the magazine, the couple will also cover her medical costs of around $20,000 (£13,500) and pay $100,000 (£67,700) to surrogate agency Growing Generations, based in Los Angeles.