Boy band favourite Antony took to Twitter to share the news with an adorable photo of his daughter Savannah, who can be seen holding up two notices and then a baby scan to reveal her impending big sister status!
The first of the three black and white photos shows the two year old holding up a sign that reads 'Guess what?' and in the second, the notice has been changed to read 'I'm gonna be a big sister!'.
The final snap sees little Savannah holding up mum Rosanna's baby scans, and the tot couldn't look more pleased (and a little surprised!) to welcome a sibling.
â¯¤ï¸¸â¯¤ï¸¸â¯¤ï¸¸ cant believe it pic.twitter.com/VWUMjBSAm4— Antony Costa (@AntonyCosta) December 12, 2016
Antony's tweet has been flooded with messages of congratulations from his 15.2k followers. One well-wisher wrote: 'amazing!!!! Huge congratulations to you both! You're amazing parents xxx' and another added: 'Congratulations one of the best couples!!
'Sooo happy for you all. Savannah will be one excited big sister ☺️ xx'
It's seems it's not just Savannah who's surprised at the baby news, as dad Antony, 35, captioned the photo: '❤️❤️❤️ cant believe it'.
Just last year, the star made a public plea for parents to get potentially life-saving first aid training after an incident with Savannah left him fearing for her life.
The parents had been visiting a wedding venue when, as Antony explained to the Mirror, 'her head tilted and her eyes rolled back.'
'She started shaking and going stiff in Rosanna's arms. Then her lips turned blue. We didn't know what was happening. We really thought she was dying.'
After being rushed to hospital, Savannah's symptoms were diagnosed as a febrile convulsion - a type of fit associated with a high fever. Thankfully Antony's daughter made a full recovery, but it made the parents more aware than ever of the importance of first aid training.
'When you have a baby, you are taught how to feed it, how to change a nappy and things like that, but they don't teach you what to do in an emergency', he said.