WATCH: Robbie and Ayda Williams welcome "secret" baby Coco – via surrogacy
Robbie Williams and Ayda Field welcome secret surrogate daughter.
Welcome! The Instagram post announcing Robbie and Ayda Field Williams' third baby together, via surrogacy, shows the hands of Robbie, Ayda, their two bigger children and newborn Coco. (Instagram)

Robbie Williams and Ayda Field have welcomed a third child together via a surrogate after a "long and difficult" struggle to have another baby.

Colette (Coco) Josephine Williams was born this weekend and the surrogate mom is doing well. "She came out of the womb with jazz hands," Robbie said jokingly. 

Happy parents Robbie and Ayda, who both star as judges in the latest series of X Factor, announced the "secret baby" in a beautiful Instagram post. 

"So we have been keeping a very special secret!" Ayda writes. "We are delighted to share with you that we have had a baby girl… welcome to the world Colette (Coco) Josephine Williams! It has been a very long and difficult path to get here, which is why we have kept it on the down low. 

"Family comes in all forms, and this little lady, who is biologically ours, was carried by an incredible surrogate mother, to whom we will be eternally grateful.

"We are over the moon to have this beautiful baby girl in our lives and so blessed that we live in a world which makes this possible. 

"As with Teddy and Charlie, we ask that you respect Coco’s privacy and allow us to grow into our new team of 5! #TeamWilliams."

Ayda and Robbie got married 8 years ago. Colette joins sister Theodora (Teddy) Rose (5) and brother Charlton (Charlie) Valentine (3). 

Keeping Coco a secret is a far cry from Robbie live-vlogging the birth of Charlie in 2014!

And yes, he was singing Let it go from Frozen as Ayda was pushing!

Congratulations to the Williams family and welcome, Coco!

Read more about surrogacy: 

Jonathan Kaplan's surrogacy story: Just a terrific boy, his single dad and 3 famous bulldogs

Robynne's story: We had a child via surrogacy

Q&A: All you need to know about surrogacy in SA

Surrogacy in South Africa: The proposed law against the "genetic link requirement" and the ConCourt ruling

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