Hold Up — Did You See the Practical Summer Dress Kate Middleton Wore to the Wedding Rehearsal?

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Kate Middleton joined Prince William and the now-newlyweds Meghan Markle and Prince Harry for a wedding rehearsal in Windsor. While this marked the duchess's first public drive through town since giving birth to baby Louis, she appeared bright — and that probably had something to do with her dress.

Kate chose a lovely floral Michael Michael Kors shirtdress ($175) for the occasion, which is a breezy number that was probably pretty comfortable for the day's agenda. The duchess accessorized with oversize Givenchy sunglasses.

While Meghan opted for an ivory bodysuit blouse and gorgeous diamonds to prepare for the ceremony, Kate's laid-back, free-spirited outfit is definitely our speed this time of year. Read on for another glimpse, then check out Kate's exact design and shop plenty of similar looks. Plus, see what Kate ended up wearing to Meghan and Harry's ceremony!