Congratulations Cristiano Ronaldo and Georgina Rodriguez!
He also added that he was "enjoying the moment" with his expanding family.
The current FIFA Best World Player of the Year announced the birth of his new daughter Alana Martina on Twitter shortly after his girlfriend Georgina Rodriguez was delivered of the baby girl in Madrid, Spain. He has two boys and two girls.
Earlier this year, he welcomed twins Eva Maria and Mateo from a surrogate mother.
In fact, in case there wasn't enough pressure on the kid, some bookmakers have even offered odds on Ronaldo Jr one day playing for Man United or Real Madrid.
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He shared the news alongside a photo of himself and his eldest son, Cristiano Jr, dressed in scrubs as they pose next to a beaming Georgina, who lays in her hospital bed.
Ronaldo made his relationship with Rodriguez public a year ago, and she announced her pregnancy weeks after the twins were born.
Captioning the image, he said: "Alana Martina is just born!"
It remains to be seen whether there will be any further additions to the Ronaldo family in the future after he had previously expressed a desire to have seven children.