Now, this week the duchess has stepped out for another important engagement.
Following Miguel Head's departure as Prince William's personal secretary, the royal couple held a farewell meeting with the former senior advisor.
'The Duke and Duchess of Cambridge this afternoon received Mr. Miguel Head upon relinquishing his appointment as Private Secretary to His Royal Highness,' the Court Circular, the official record of past royal engagements, stated.
Head has worked for the Royal Family for over a decade, and left his position earlier this year.
Speaking to HarpersBazaar.com, royal biographer Duncan Larcombe said: 'It is traditional for new royal mums to take a six-month break from official engagements. The wedding doesn't count because it was a "family affair" but other than that, she will pick and choose her engagements. If she wanted, Kate could disappear into the background until October!'