OK, so the former Kate Middleton apparently can't be a bridesmaid at Pippa Middleton's wedding this weekend, but that doesn't mean the sisters aren't thick as thieves.
Pippa and Kate have seen each other through some crazy life transitions (hello, going from a commoner to a royal can't be easy) — and they've done it looking super cute. In honor of Pippa's latest transition from single to married, we're taking a look back at these two through the years.
Originally published November 2016. Updated May 2017.