They're due to welcome their first child any day now but as their youngest nephew Prince Louis rung in his milestone birthday, Prince Harry and Duchess Meghan made sure the spotlight was on him!
On Tuesday, April 23rd Prince William and Duchess Catherine celebrated Louis' first birthday by releasing three stunning new images of their son.
And now, super sleuthing royal fans have noticed an adorable message - believed to be penned by Meghan - on social media which actually reveals a huge clue on whether the Duke and Duchess of Sussex have welcomed their own baby yet.
Underneath Kensington Palace's post featuring the new Prince Louis' photos, fans noticed a sweet message from Meghan and Harry's newly-launched Sussex Royal account.
"Happy birthday Louis! Sending lots of love from both of us xo," the message read, accompanied with a cake and balloon emoji.
Indeed, since they unveiled their new Instagram account there have been several telltale signs that Meghan is the mastermind behind it.
And this latest development has markings of Meghan, who was a big fan of an emoji back in her Tig days, all over it.
Meanwhile, many fans have also pointed out the fact the note has been signed off "love from the both of us" - perhaps another subtle clue Meghan and Harry haven't welcomed their baby yet, despite fevered speculation they may have.
While the world waits to meet Baby Sussex, on Tuesday it was all about Prince Louis as fans the world over swooned with the release of his adorable birthday portraits.
Snapped by his talented shutterbug mum, it's only the sixth time the public have been given a glimpse of Louis since his grand arrival last year and he has grown up so much!