Cast your mind back a few months, to when Pippa Middleton requested her guests wear two separate outfits to her wedding - we bet her guests let out a bit of a sigh, after all, finding one wedding guest dress is hard enough, let alone two!
Her sister Kate was obviously in attendance, wearing a striking blush pink Alexandra McQueen to the ceremony, but until now we were in the dark about what she wore as her second outfit.
Twitter account Kate's Closet may have lifted the lid on Kate's second outfit though, with the above tweet revealing a little peak at what she was wearing - and it's high street!!
That's right, the future Queen of England wore a Zara number to her sister's wedding, and it cost just £39.99.
We're sorry to report this dress sold out last year, but we've gathered an article of the 100 best guest dresses for loads of guest dress inspiration.