Kate Middleton Just Won Throwback Thursday

Kate Middleton isn't really showy. Yes, she's a princess, but she tends to keep it chill by re-wearing items and not taking advantage of the fact that she could wear a tiara every day, if she wanted to (like I would do). Thursday night, Kate Middleton wore Princess Diana's tiara while attending an annual event at Buckingham Palace and it was the ultimate throwback Thursday outfit.

It turns out, this is only the fifth time the Duchess of Cambridge has worn a tiara since marrying William, and I can't imagine she ever wore one before the royal wedding. While attending an event honoring Britain's diplomats, Middleton wore Diana's famous Lover's Knot tiara, which Queen Elizabeth originally gave to Princess Diana as a wedding gift. The tiara is has been in the family since 1913 when Queen Mary had it commissioned to replicate a 200-year-old crown worn by Mary's grandmother, Princess Augusta. Casual.

Now, the Cambridge Lover's Knot tiara, as it is also known, is on loan to the Duchess, and she actually wore it for the same event last year. Middleton paired the tiara with a red Jenny Packham gown and diamond earrings. However, the tiara wasn't the only thing she's worn twice. Kate Middleton's Jenny Packham gown was also a repeat wear — she originally wore the red gown for a state banquet in 2015.

Can't really get a better throwback Thursday than this.

All hail the queen, err, Duchess.