The Saturdays singer tweeted the snap of her and her footballer fiancé Wayne Bridge planting a kiss on Parker's head.
The 24-year-old accompanied the adorable picture with the caption "So much love" on her Instagram account.
Frankie and Wayne's bundle of joy sported a cute navy and white stripey outfit and a cheeky grin for the photo.
The songstress was a picture of health with radiant skin, glossy hair and the warm glow of motherhood shining through in the shot.
Reading FC player Wayne looked every inch the proud father and husband-to-be as he looked over at Frankie who gave birth to baby Parker on the 18 October.
Fans had been eagerly awaiting the first photo of the couple's baby ever since.
"Wayne and I are so proud to say our little boy Parker Bridge was born this morning," Frankie tweeted on the day he arrived. "7lb 13oz. All doing well and absolutely besotted ❤😍️"
Frankie, 24, broke the news of her pregnancy in May, tweeting: "Some big news from me today! Wayne and I are having a baby.
"We are both SO happy and can't wait for his or her arrival!".
It followed the couple's engagement a month earlier after a three-year courtship. The brunette teased fans on the social networking site writing, "Guess what?!!!!" and linking to an image showing her jokingly gasping in shock, a diamond sparkler adorning her finger.
Wayne asked for her hand with a quirky proposal involving her beloved dogs wearing bride and groom outfits.
The new mum won't want for advice. HELLO! Online blogger Una has a little girl called Aoife Belle, aged 19 months, with her husband rugby player Ben Foden. Meanwhile their colleague Rochelle Humes is mother to a five-month-old Alaia-Mai with her man Marvin Humes.
For more about The Saturdays click here to read Una's blog