And Google is not one to forget the occasion.
While at Wimbledon, Kate did her princess-ly duty and made the social rounds, and was then introduced to Australian tennis player Dominic Thiem-who caused her to fly into what The Daily Mail describes as "fits of giggles". The action will be incredible throughout the tournament, but Wimbledon is famous for its upsets, especially in the early rounds. The Google letters form the audience, save for the letter L, which becomes the match's umpire.
There's a hawk, tucked in the top-right corner of the doodle which Google has named "Rufus the Hawk".
The armed police are being joined by plain-clothes units with more than half a million spectators expected in the next two weeks. British champ Andy Murray will be defending his title in the men's singles tournament, but last year's victor of the women's title Serena Williams will not be on court this summer, as she is now pregnant.
As Patron of the All England Lawn Tennis and Croquet Club, the Duchess is a regular attendee of the tournament. Wimbledon is also considered among the four major annual tennis tournaments known as the "Grand Slams" and the only one which is still played on outdoor grass courts, as reflected in the doodle.
With all the qualifiers decided last week, the biggest annual tennis tournament of all starts today.
Great Britain's Andy Murray attends the Wimbledon Preview press conference.