Remember that time we (and Prince Harry) found out that "what happens in Vegas" can end up on TMZ and other media outlets? Well, last year, the city of Las Vegas sent out a message clearly calling out the cads who snubbed their famous motto. This year, the Las Vegas Convention and Visitors Authority hopes that show of solidarity will be enough for Prince George --currently age 0 -- to come play in 21 years and posted this cheeky invite its Facebook page. A second post included a more formal invitation to celebrate the big day, just in case he's a stickler for formalities.

A special shout out to Uncle Harry might have been funny, too, but perhaps by then he'll be past his Vegas prime.