The advertisement was spotted on a babysitting website, and outlines her very exacting requirements for her forthcoming arrival.
'Soon-to-be first-time parents searching for the perfect nanny to extend the love and normality of an everyday family home', the advert reads.
'The right nanny will be fluent in several languages of the British Commonwealth, confident in the public eye, and willing to travel regularly'.
'He or she must have excellent posture, grace, poise and perfect diction. A driving licence is not necessary, as a chauffeur will be provided. A love of dogs is beneficial, and exquisite taste in baby clothes is ideal to ensure the new arrival is as stylish as mummy'.
And, obviously taking the long-term educational development of her child seriously, 'Kate' also stipulates:
'The ideal candidate will also possess a classical education, including Greek and Latin, competency in two instruments, be passionate about croquet, polo, and be interested in art history and antiques. Experience dealing with spoilt first children would be helpful. Confidentiality is essential. Only candidates of the highest calibre will be considered'.
Tom Harrow, CEO of Findababysitter.com said that thousands of new nanny jobs get posted on his site, but that this one 'really stood out'.
"Especially as it came from an email address that we believe has a royal connection," he said.
Hmm, what was it? firstname.lastname@example.org?