Ready, Set, Go!

Pippa's Cross America Cycle Race

Axelle/Bauer-Griffin/GC Images, via Getty

And they're off!

Pippa Middleton and her younger brother James set off on their epic cross-country trek from San Diego to Annapolis, Md., yesterday as part of the "Race across America".

They are part of a team which will attempt to bike coast to coast through 12 states in eight days.

Pippa and and her brother are part of a team of eight cyclists, and will be riding three hours a day each in relay.

Pip told the Mail: “I think every cyclist including me will be layering it on. Once we get going it’s non-stop, with very little sleep. It’s nerve-racking but exciting and all for a great cause.”