Dermot O’Leary has revealed that his wife is pregnant with their first child.

The X Factor host broke the news to fans on Instagram on Saturday evening when he shared a photograph of an announcement board with the message: “Koppang O’Leary productions presents ‘New Arrival’, coming soon.”

The 46-year-old presenter added: “We’re pleased to announce that we’re expecting a little Koppang O’Leary.”

His wife, TV producer Dee Koppang O’Leary, 41, shared the same message on her Instagram page.

Shortly after they shared the news, the pair were photographed together attending a party for Bafta nominees at Kensington Palace ahead of the awards ceremony tonight.

The couple, who married in September 2012, were inundated with congratulatory messages on social media.

TV presenter Vernon Kay said: “Welcome on board team K. O’L! Congratulations from the Ks!”

Singer Sophie Ellis-Bextor wrote: “That’s so lovely. So happy for you both (and happy for your baby, too!)”

Dermot previously told The Sun in 2015 that him and his wife were too busy with work to have children.

He told the newspaper: “I do want kids with my wife, but I want them when we both think it’s the right thing to happen.”