And we're speculating that with this exciting new chapter comes a posh present from the doting daddy to his beloved wife.
While we're still anxiously awaiting any confirmed details of what Will might gift his gorgeous baby mama any day now, we're guessing that it's going to be something extraordinarily special and sparkly.
That's right, according to the Daily Express, the Duke of Cambridge has enlisted the help of the Queen's jewelers and is rumored to be giving his ladylove a brooch with a pink diamond.
This token of affection is a departure from the engraved gold medallion that Prince Charles gave Princess Diana back when William was born, and it feels like a classy and modern move by the 31-year-old royal.
Furthermore, since we know that Kate favors elegant and classic pieces, we think this might be the loveliest new addition to her jewelry collection!
A pink diamond certainly exudes a feminine radiance to it, making for the perfect memento to celebrate this incredible occasion.
Additionally, the gem holds special significance in the royal family given that Queen Elizabeth II owns one of the finest uncut pink diamonds in the world, a wedding gift from an esteemed Candian geologist.
"William has been giving this a lot of thought for a long time," a source close to Prince William told the publication. "He's got lots of ideas from studying history of art at university and decided on a pink diamond as a centerpiece because it is pretty and feminine. It will be a thank you present to Kate."
Well done, Will!
We can't wait to see the final present.