A home movie of the actress from 1990 obtained by ET shows a 9-year-old Meghan playing around with friends -- and pretending to be the queen!
In the video, Meghan joins her pals for a play they put on called "The Royal Highness," where she has no problem playfully shouting out orders.
"OK and go do the grocery shopping. I didn't have time to do it," she instructs one friend, before telling another, "Make me 900,000 cookies!"
It seems the group was preparing for an international affair, as a crown-wearing Meghan reveals, "I'm having people from Florida and Canada, Mississippi, Missouri," and has to make sure the whole house is in order.
"Princess Cara, I thought I said no eating cookies in bed!" she exclaims, before it's finally party time. "Follow me, girls, for my party. Come along."
It seems all that practice came in handy when she met Harry and the rest of the royal family. Queen Elizabeth II formally gave Harry her consent to marry Meghan in March, and in an interview with ET at the time, royal expert Katie Nicholl said the actress was quick to gain the queen's trust.
"Everything I heard from the sources I spoke to was that she really felt from the outset that Meghan was a positive person in Prince Harry's life, that she made him very happy and that she was really, very supportive," Nicholl said.
Now, Meghan is less than two weeks away from becoming an official member of the royal family. Keep up with all of ET's coverage of the royal wedding as we count down to May 19.