Pippa Middleton's Sister Kate & Prince William Join Instagram!

Pippa Middleton reaches into her bag for something while walking to a telephone box to check her hair on Wednesday afternoon (January 14) in London, England.

According to E! News, the 31-year-old younger sister of the Duchess of Cambridge is planning on riding in the British Heart Foundation’s London to Brighton Bike Ride this June. It’s 54 miles!

PHOTOS: Check out the latest pics of Pippa Middleton

Meanwhile, Pippa‘s sister Kate and Prince William just joined Instagram, so be sure to follow them!

15+ pictures inside of Pippa Middleton out and about in London…