Pippa Middleton
The Pippa Middleton designed floral silk dress could be yours, as it goes up for auction in aid of the British Heart FoundationAFP/Getty

The Middleton sisters certainly know how to make a fashion statement. While everything Kate wears flies out of stores in minutes, Pippa Middleton is hot on her elegant sister's heels in the fashion stakes.

She famously made headlines in a figure hugging Alexander McQueen gown, when she turned bridesmaid at the royal wedding. Her shapely derriere caught the attention of the world and replicas of the £20,000 gown were snapped up in Debenhams at a fraction of the cost.

The party planner is now attempting to make good use of her reputation as a style icon, all in the name of charity. Last year, the 32-year-old created a limited edition tea dress and matching scarf in collaboration with designer Tabitha Webb.

While the sought after £295 silk dress is officially sold out, the item will now go on sale as part of a charity auction for the British Heart Foundation. Fans of the royal sibling will be able to replicate her style as the dress goes up for grabs at the Roll out the Red auction which was launched today. (28 January)

Pippa, who has in the past turned her hand to a number of professions, including writing a column for The Daily Telegraph, described the design process as both 'fun and creative' and revealed she drew on favoured styles from her own wardrobe for inspiration for the £295 dress and £95 scarf.

"As an ambassador of the British Heart Foundation, I'm delighted that all the profits of the sales will go towards their lifesaving research into heart disease," she told Hello! magazine at the time. Creating the limited edition pieces was a fun and creative way to fundraise for the BHF London to Brighton cycle challenge."

Pippa wore the dress to Wimbledon last summer, and much like her sister who sparks a buying frenzy for everything she wears, the two-piece floral outfit sold out in minutes. The profits from the sale of the items, which were available on Tabitha Webb's website and her London store, went towards Pippa's 54-mile London to Brighton bike ride in aid of the BHF.

Pippa Middleton
The two-piece limited edition outfit includes a floral cashmere scarfAFP/Getty

According to Mail Online, other exclusive items featured in the auction include a Keepsake sleeveless coat belonging to The Saturdays' Mollie King, who hosted the charity's Roll Out The Red Ball in 2015.

For those less sartorially inclined, there's also something for TV enthusiasts, including the chance to win a date with Made In Chelsea's Ollie Locke and a Valentine's weekend getaway to Highclere Castle, made famous in Downton Abbey.

The online auction closes at midnight on Thursday, 11 February and the money raised will go towards life saving research into heart and circulatory disease. Pippa Middleton will also give the welcome speech at the charity's annual Roll Out The Red ball, which will be hosted by Natasha Kaplinsky.