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…

Kate Middleton makes the most of her single status and parties with a gal pal at Mamilanji nightclub in the Chelsea area of London on Thursday.

Fashionably dressed in a bold blue dress and brown suede boots, Miss Middleton, 25, seemed to be making the most of her high-profile split from Prince William!

More pictures inside of Kate’s night out…

Kate Middleton sans boyfriend Prince William (he had army duties in Dorset) shows her love for horse racing and made her second appearance with a mystery male at the Cheltenham Festival in England.

Kate, 25, wears her favorite stretch suede boots, cashmere pashmina and ‘The Alexander’ jacket trimmed with silk paisley (both by Katherine Hooker), a Philip Treacy beret, and Chanel sunglasses.

Kate and Wills together were spotted at the Cheltenham Festival on Tuesday.

Prince William, and girlfriend Kate Middleton suit up and arrive early Tuesday morning for the first day of horse racing at the Cheltenham Festival in Cheltenham, England.

The royal couple was just spotted last week skiing together in the Swiss Alps.

Prince William and his royal bride-to-be Kate Middleton take to the slopes of Switzerland for a once-in-a-lifetime ski trip.

Upon leaving their Swiss Alps resort, Wills‘ gorgeous girlfriend Kate reportedly had a run-in with another skier, knocking each other down, covering themselves in head-to-toe snow. Luckily, neither party was injured!

Wills, 24, and Kate, 25, are said to be staying in a $33,000-per-week chalet during their week-long break with friends in the exclusive Swiss resort of Zermatt.

Prince William cheers on the English rugby team sandwiched between his little brother Prince Harry and girlfriend Kate Middleton. The trio watched the RBS Six Nations Championship match between England and Italy at Twickenham on Saturday, Feb. 10 in London, England. England swept to a 20-7 victory against Italy.

The question still remains: Will Wills and Miss Middleton announce their engagement soon?