Christine Lampard is pregnant with her second child with footballer husband Frank.
The presenter, 41, announced the news in a post to her 559,000 Instagram followers on Saturday.
Sharing a photo of her cradling her baby bump, she wrote:
The couple, who married in 2015, are already parents to daughter Patricia, two.
Chelsea manager Frank, 42, is also father to daughters Luna, 15, and Isla, 13, with his former fiancee, the Spanish model Elen Rivas.
presenter Phillip Schofield was among those sending their best wishes.
He commented: "Congratulations darlin what lovely news. lots and lots of love to you all."
Fellowpanelist Rebekah Vardy added: "Congratulations my darling. so happy for you both."
Other well-wishers included Piers Morgan, Emma Bunton, Kimberley Walsh and Binky Felstead.
The couple tied the knot in December 2015 at St Paul's Church in Knightsbridge, and the ceremony was followed by an intimate reception at London's The Arts Club.
Patricia, their daughter, was named after Frank's mother, who died in 2008.