The breathtaking Spanish model posted the photo just two days after giving birth - and she looks sublime!
The new mum, 22, is dressed in a silk dressing gown, holding her bub as they chill on a lounge.
Georgina used the post to thank all those in her life that had helped her through her transition to motherhood.
In Spanish, she penned, "Alana Martina was born on 12/11/17."
"Becoming a mother and raising our little ones at home has given me absolutely happiness, and now that Alana Martina has arrived, we are complete, and if at all possible, even more happy."
Georgina then took focus on her support system, gushing, "I want to thank the hospital staff for their impeccable care and for looking after me before, during and after the birth."
"Also, I'd like to thank our families and friends for the calls, messages, visits and little gifts they've given during my pregnancy and after the birth."
Shouting out to her fans, "Last, but not least, to all our followers and fans who have supported us and have sent well wishes and good energy."
The new mum added, "We are so happy and thankful to God for our healthy little Alana Martina, and of course, for our other three children, who I shower with hugs and kisses."
"It's a beautiful thing to see how my mother dotes on Alana Martina and keeps her calm. I wouldn't change this feeling for the world. I love my parents, I love my family. Thank you everyone!"
The iconic Portuguese legend announced his daughter's arrival on Instagram, posting a photo of his partner holding their bub, with big brother seven-year-old Cristiano Ronaldo Jr looking at his little sister with pride.
"Alana Martin has just been born! Both Geo and Alana are doing great! We're very happy," the Real Madrid player penned.
Baby Alana joins Cristiano's young brood - five-month-old twins, daughter Eva and son Mateo, who were reportedly born via a surrogate in the US in June, and oldest child Cristiano Ronaldo Jr, who is also believed to be born through a surrogate although Cristiano has never confirmed this.
The soccer legend adores fatherhood, recently confessing, "Being a father is a unique and personal journey, something that has changed me completely. It's taught me things about love that I never knew existed. It has softened me and given me a different perspective on what is really important in my life."
And he has no plans of slowing down - with his eyes set on his very own soccer team, he continued, "I can't wait to be a dad again. Being a father and seeing my family grow is without doubt the greatest privilege I've had."
"Spending time with them, being by their side, smiling and laughing with them. They've brought a lot of happiness and joy to my life."