15 Times Kate & Pippa Middleton Were the Very Best of Friends

kate middleton
Mirrorpix/Splash News

It's no secret that Kate Middleton is uber-close with her family, but she's always seemed to share a special bond with her younger sister, Pippa. Back in the day, before Kate was a princess, the girls' special bond was more than apparent to all of London, but even as time has gone on, the two remain thick as thieves. 

From their clubbing days in London to supporting each other on their wedding days, here are 15 times Kate and Pippa Middleton proved to be the very best of friends.