Duchess Kate, Princess Charlotte, Prince George and Prince William look out from the balcony of Buckingham Palace during the Trooping the Colour parade in London on June 17, 2017. The royal baby will arrive in April.
While the exact date of the baby's arrival was not disclosed, there is a chance that the third royal baby will share a birthday with the Queen, who will celebrate her 92nd birthday on April 21.
Many have speculated whether the Duchess is trying to throw the public off the scent on the gender of her baby by switching it up between blue and pink.
The Duchess of Cambridge has revealed her favourite thing about being a princess while speaking to primary school students this week. She is the fourth-in-line to the British throne. The Duchess also danced with Paddington bear on the platform.
She was an unannounced addition to the event alongside the royal brothers as they saluted 150 apprentices who've graduated from the royals' own mentoring programme.
A Kensington Palace spokesperson said the 35-year-old expectant mum is "better but she's still suffering". The Duchess was forced to pull out a number of engagements and even missed Prince George's first day of school. The Palace rescheduled the royal tour with a two-day visit of Prince William alone in Finland in late November.
The 35-year-old royal - who is three months pregnant with her third child - returned to her duties this week following two months off due to severe morning sickness, and chose to join her husband Prince William and his brother Prince Harry at the ground for the graduation ceremony of more than 150 sports coaching apprentices.