She told the paper she was 'ecstatically happy to be pregnant', adding: "It's no secret that our son Zephyr was a longed-for baby, and we are thrilled at the prospect of having a brother or sister for him.
Julia confirmed the news on Twitter today (Friday, September 26), tweeting:
The day before her announcement, Julia Tweeted a vertigo-inducing Selfie from the top of London's 734-foot high 'Cheesegrater' skyscraper, along with message: "Incredible views from The Cheesegrater & a tummy-in-the-mouth lift ride to the top.fastest in Europe"
The first person to congratulate Julia on her happy news was her friend, showbiz manager Jonathan Shalit, who Tweeted:
Julia had her first child at the age of 41, two years after she began dating property developer Gerard Cunningham, 55.
But she was concerned she'd never have children after being diagnosed with endometriosis, a painful condition affecting the womb.
There were further problems when she was diagnosed with pre-eclampsia, which is characterised by high blood pressure and can be dangerous to both mum and baby.
Zephyr finally arrived after Julia was induced, an experience she described as 'traumatic towards the end'.
Julia said last year: "I would love Zeph to have a brother or sister but I am 43 and have to be realistic."
Congratulations Julia and Gerard!