Pippa Middleton: U.S. Open in New York City!

Pippa Middleton looks lovely as she heads into the USTA Billie Jean King Center to attend the 2012 U.S. Open on Tuesday (September 4) in the Queens borough of New York City.

The 28-year-old younger sister of Catherine, Duchess of Cambridge is in the Big Apple to attend publisher meetings and for some personal vacation time.

PHOTOS: Check out the latest pics of Pippa Middleton

Over the weekend, Pippa reportedly met up with hotelier Andre Balazs in Shelter Island. The pair joined a group of friends for dinner at Sunset Beach and a game of ping pong.

Pippa also had dinner at Catch restaurant over the weekend and introduced herself to Chace Crawford at the Electric Room inside the Dream Downtown last night, according to Us Weekly.