The Saturdays singer showed off the three-week-old in an adorable snap posted on Instagram, alongside her fiance and baby daddy Wayne Bridge.
Frankie Sandford and Wayne Bridge with their son Parker
She captioned the snap: "So much love."
It is the first child for the couple, who have been dating since December 2010 and got engaged in April this year.
The pair out with Parker last month
Wayne already has a six-year-old son, Jayden, with his ex-girlfriend Vanessa Perroncel.