The 35-year-old actress has revealed all in her new book, Whisky in a Teacup, about that time she got her invitation to meet the Duchess of Cambridge while she was touring with Prince William in North America in 2011.
"The scream that issued from the lips upon receiving (the invitation) — you would have thought I was going to die," Witherspoon explains.
Witherspoon also admits to obsessing over Duchess Kate in the lead-up to the event. "I've never seen you this excited", her husband remarked on the day, when Reece woke up at 4am to get ready. "I love Kate Middleton that much," she replied.
Witherspoon recalls the Princess as being warm, elegant and composed as she told her a joke, writing, "I immediately fell under her spell."
Why the obsession with the royal? Reese explains, "Southern women like how the royals value family and how they're always doing good for others."
At the time of the event, Reese admitted on Ellen about having a wardrobe meltdown beforehand. "I must have tried on like six outfits," Witherspoon confessed. "I'm meeting a princess! You don't understand. You have to be wearing the right outfit and the whole thing."
See, celebs really are just like us!