Westlife singer Kian shared the happy news via Facebook, letting the couple's adorable son Koa, two, make the big announcement.
In a cute video, an excited little Koa says: "My mummy has a baby in her belly and I'm going to be a big brother!"
What lovely news ahead of Christmas!
Congrats to Kian and Jodi!
Kian and former Hollyoaks actress Jodi, who appeared on the latest series of Big Reunion with band Girl Thing, married in Barbados in 2009 and their son Koa arrived two years later.
Little Koa is already inheriting his parents' star quality, making a cheeky appearance on This Morning last year.
While Kian was discussing his I'm A Celeb experience, Koa darted onto the set of the ITV show to join his dad on the sofa, bringing mum Jodi with him.
Still blissfully in love, Jodi told us earlier this year of their bond: "My mother always told me that my husband would be my best friend. My mum and dad and Kian's mum and dad both had long lasting relationships, I think that made us believe in marriage.
"My mum always said friends will come and go and one day you'll look at your wedding photograph and there won't be half the people in your life that were there on your wedding day and that's OK, because your husband will be your best friend."
Their happy news came on the anniversary of Kian entering the I'm A Celebrity... Get Me Out Of Here! jungle last year.
Kian was crowned King of the Jungle 2013 with proud Jodi cheering him on every step of the way.
Earlier this week, Kian appeared on ITV's This Morning to announce the first big twist for this series, which sees the celebrities split into two groups ahead of arriving in camp.
Viewers can vote which group goes to normal camp and which goes to the celebrity slammer, a jungle-style jail. One of the stars in the latter group will have to face the first Bush Tucker trial.
I'm A Celebrity begins Sunday 16 November at 9pm on ITV
Check out all of this year's jungle campmates here!
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