Kate Middleton and Her Sista Pippa

Party-princesses-as-of-late Mischa Barton and Kate Middleton, Prince William‘s ex, enjoy a night out at Boujis nightclub on Thursday in South Kensington, London.

According to British media, Kate, 25, has quickly become one of the hottest invitees on the capital’s social radar. She was also joined last night by her younger sister Philippa “Pippa” Middleton, 22.

It appears that Kate has dropped a few pounds since her break-up with Prince William. She was spotted with an open pack of cigarettes stashed in her handbag. Bad habit, Kate. Bad bad bad!

More pictures inside of Mischa, Kate and Pippa…