Ever since Kate Middleton became a member of the royal family and stepped into the spotlight, we've gotten better acquainted with her younger siblings, Pippa and James. Kate's sister Pippa famously served as her maid of honor during her royal wedding, while Kate's attractive brother James has joined her for a few family outings. It's pretty apparent from their cute appearances together, they are all incredibly close. Whether they are cheering on their favorite tennis player at Wimbledon or they are celebrating each other's personal milestones, they always seem to have a great time together. Keep reading to see all of their best sibling bonding moments over the years ahead.