The Royal Family Instagram account shared a photo of William with his grandmother the Queen, 92, with a similar celebratory message. Add Royal Family as an interest to stay up to date on the latest Royal Family news, video, and analysis from ABC News.
The little prince, the younger brother of Prince George and Princess Charlotte, will be baptized in the Chapel Royal at St James's Palace.
According to Keith, William also revealed that Charlotte's favourite colour is pink - which should probably come as a relief considering her new tote is just that.
Their sister Charlotte was christened at the Church of St Mary Magdalene in Sandringham.
The Supreme Court just caused stocks of online retailers to tumble
On Twitter, President Donald Trump called the decision a "Big victory for fairness and for our country". Chief Justice John Roberts joined Stephen Breyer, Sonia Sotomayor and Elena Kagan in the dissent.
"I have been the Patron of the [Defense and National Rehabilitation Centre] for 4 years and I have enjoyed every single moment of it", Prince William said.
"We'll no doubt have the official christening photos, as we did with Prince George and Princess Charlotte", he continued.
The Queen, Prince Charles and the Duchess of Cornwall are set to attend. Certain parts of their eight-layer confection were reserved for the christenings of their children, an age-old royal tradition. Get HELLO! Canada, PEOPLE, Vanity Fair and over 100 more of the world's best magazines for one low monthly price at Texture by Next Issue.