The 32-year-old actress revealed the news via her Twitter account, reported Digital Spy.
It will be Ghadie's second child, but her first with partner Sylvain Longchambon, who has retweeted the news.
The pair met when they were partnered on "Dancing on Ice" in 2012.
Ghadie already has a daughter Freya with her ex-husband, property developer Matthew Smith.
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