Kate Who? Pippa Middleton and Brother James Hit the Slopes for Charity

Siblings will participate in cross-country ski marathon Sunday to benefit Magic Breakfast, which delivers breakfast meals to needy children at U.K. primary schools

Kate Middleton isn't the only do-gooder in her family!

The charitable Duchess of Cambridge's younger siblings, James and Pippa Middleton, are skiing for a good cause. On Sunday, the duo will take part in the Vasaloppet, a 56-mile cross-country ski marathon across Swedish mountains.

So who will they be raising money for?

Needy kids.

According to the Express, Pippa and James are collecting donations to benefit Magic Breakfast, a charity that delivers free, healthy breakfast foods to hungry children at U.K. primary schools.

As of Sunday, the duo already had £4,300 ($6,822) in pledges towards their completion of the marathon, including a £1,000 ($1,586) donation from one couple. (Nope, it wasn't Prince William and Kate.)

Braving the cold and embraking on a major physical challenge for charity? James and Pippa, we're royally impressed.