As Britons wet the baby's head, it is estimated the country will spend £62 million on alcohol and £25 million on food for royal baby parties, according to Joshua Bamfield, director of the Centre for Retail Research.
A further £156 million pounds is expected to be spent on commemorative china and other collectables such as toys, books, DVDs and media.
Then of course there is the expected influx of tourists and the knock-on 'Kate' effect as new-parents try and copy the Duchess of Cambridge with her post-maternity fashion choices, baby clothes and nursery picks.
Kate Middleton has already proved her pull on the nation's purse strings with her outfits frequently selling out, from that famous blue Issa engagement dress to her Topshop maternity dress.
'This is a good news story and there really is no downside. With the birth coming in July, people will have time to get involved, and that means additional spending,' Bamfield told Reuters.
While this is a big boon for the country's coffers, it doesn't compare to the £2 billion that the Royal wedding was thought to have injected into the economy.
On that note - here's some royal baby party food & drink recipes for you...
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