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The littlest royals will have to start practicing their bows and curtseys at a fairly young age.

Now that the Royal Wedding has come and gone, we can get back to focusing on our favorite members of the royal family: Prince George and Princess Charlotte, of course. Whether they’re throwing a mini royal temper tantrum or completely hamming it up for the cameras or a crowd, we can’t get enough of the darling duo. And we certainly can’t wait until younger brother Prince Louis is old enough to join his family for public appearances so we can see them all together. But there’s one thing we haven’t seen either George or Charlotte do yet: bow before their great-grandmother the Queen.

According to royal historian Marlene Eilers Koenig, though, that will change soon. Koenig told Hello! that young royals are expected to start following that tradition “Certainly by age 5. The only person they will curtsy or bow to is the sovereign. A royal highness does not curtsy to another royal highness.”

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Bowing and curtseying upon greeting and departing the Queen is a courteous sign of respect and a strictly followed part of royal protocol. We’ve seen William, Kate, Harry, and Meghan all bowing and curtseying before the Queen, so we know George and Charlotte have great teachers.

Since Prince George recently celebrated his 5th birthday at the end of July, it’s likely we’ll soon see him start bowing before the Queen in public. And he’s probably started practicing in private already. At three years old, Charlotte has a bit longer before she has to start curtseying in public, but we honestly wouldn’t be surprised if she picks it up a bit earlier—if only just to show off for the cameras.