Prince William Jokes that Princess Charlotte Is 16 After Celebrating Her 6th Birthday

We know, it's been a pretty wild year for the royal family. But perhaps their most shocking revelation? Prince William's little girl is all grown up - we're talking teenager status. Ok, fine, she's not there just yet. But according to her amused father, she may as well be...

On Tuesday, May 4, the Duke of Cambridge gave us an inside look at life behind closed doors - more specifically, his daughter's recent birthday festivities. But while Princess Charlotte may have rung in her 6th birthday just 2 days earlier, it appears we've already missed a whole lot...

"If you ask her, she says she's 16," William joked about his middle child. "Charlotte says, 'I'm 6 now, I'll do what I want,'" he revealed. Then again, with her dad a prince and her great-grandmother, the Queen, she's not exactly wrong - is she?

But if there's one thing we can all agree on here? "They grow up very fast," as William put it - and he's right. In fact, it feels like just yesterday we watched him and his Mrs. head down the aisle at Westminster Abbey. Fast forward to today? And the Duke and Duchess are parents to teenagers (ok, not exactly, but you get the gist).

But they're not the only ones who've taken us on one whirlwind of a ride over the years. Of course, we're talking about their in-laws: Prince Harry and Meghan Markle. In case you forgot, the former royals left us scratching our heads after announcing they were stepping down from their royal duties back in February.

Since then? The couple seems to be having no problem adjusting to their new reality as... regular folks. In fact, it appears Meghan and her husband - along with baby Archie, of course - have been doing just fine for themselves after their royal exit led them back to Hollywood.

From A-list friendships (cue Chrissy Teigen) to authoring children's books, it appears the former royals won't be slowing down anytime soon. We'd stay tuned...