The brunette Brit beauty picked up a cup of coffee along the way, looking stylish in a black and white dress.
The outing comes as Miss Middleton continues to keep people wondering about her relationship status.
Pippa was recently seen getting close with Alex Loudon at a cricket championship match, this coming just a month after an insider told The Sun, "Pippa has become very high-profile and it's put a strain on things. They're moving in different circles. It is common knowledge in their close circle of friends that Pippa and Alex have recently split up."
Enjoy the pictures of Pippa Middleton arriving at work in London on a very wet day 8-24-11.