'What About Us' singer Rochelle couldn't resist uploading a picture to Instagram on New Year's Day showing Marvin cradling their six-month-old child.
She added the caption: "Caught the cuteness in action. Such a Daddy's girl! Literally melts my heart!
In another picture, posted by Marvin, we see the doting dad feeding his daughter, who, as always, has her face partially obscured from the camera. He added the caption: "Me and my Princess.. Thirsty in the sun!"
Rochelle, Marvin and Alaia-Mai welcomed in the New Year while on holiday in The Maldives. (We know, so lucky!)
They're enjoying a well-deserved break following a memorable year that not only saw them becoming first-time parents and celebrating their first wedding anniversary, but was also filled with professional triumphs.
Rochelle and The Saturdays achieved their first UK number one with single 'What About Us', and Rochelle and Marvin successfully made a foray into TV presenting with well-received stints on This Morning.
For Marvin, it was the year that JLS called time on their partnership after six years together and he moved into new ventures including multiple hosting slots on Capital FM and landing the co-presenter role on The Voice UK season three.
It will be full steam ahead for Marvin on The Voice, when it returns to our screens on 11 January, while Rochelle will start her New Year by competing on Sport Relief's Bake Off between 13 and 16 January.