Pippa Middleton gets in the habit – of going to work in London on Monday in a $750 dress!

Her Royal Hotness dressed up in a black dress with a white Peter Pan collar by the UK designer Suzannah, and RadarOnline.com has the photos of her new look – a pricey conservative nun.

Pairing the dress with black tights and black flats to show off her toned runners legs, Pippa carried her Modula bag and her Knomo laptop case and had her long brown locks slightly curled.

Pretty woman walking down the street...

Pippa Middleton traded in her normally conservative jeans for a sexy mini dress and knee-high boots on Thursday and RadarOnline.com has all the photos.

PHOTOS: Pippa Middleton Wears Sexy Boots And Dress

All that running definitely pays off!

Pippa Middleton's short swan dress was the perfect way to show off her sexy legs on the way to work on Thursday and RadarOnline.com has all the photos.

Just two days after her 28th birthday, Kate Middleton's younger sister put on some sassy red shoes, matched it with a red Prada purse and hit the streets.