Kensington Palace confirmed the identity of the royal couple's childcare provider on Thursday (20 March), but stressed she would like to remain out of the public eye.
In a statement, the palace said: "As an employee of the Royal Household we would ask, please, that Maria's privacy, and that of her family and friends, be respected.
"We will not be giving further details on Maria or her employment, except to say that the duke and duchess are of course delighted she has chosen to join them."
It's believed that Maria trained at Norland College, a childcare institute based in Bath. Its mission statement says it aims to "provide the very best early years education and training for its students, giving them the knowledge, experience and skills to maximise their own potential and that of the children in their care."
Maria has been hired as Prince George's full-time nanny and will travel with the youngster and his parents to Australia and New Zealand next month.
Prince William and Kate Middleton are due in the countries for an official tour beginning on 7 April.
It will mark Kate's third overseas trip this year following a jaunt to Caribbean island Mustique with the Middleton family (and George) in January, and a week's holiday in the Maldives with Prince William in March.
Kate gave birth to Prince George, the third in line to the throne, on 22 July 2013.
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First pictures of Prince George below: