The Duchess of Cambridge's sister has chopped off her long brunette locks, a trademark for both the Middleton sisters, opting for a shorter style with shoulder-length hair.
To debut the new look, Pippa, 30, opted for a vibrant green Tabitha Webb dress complete with lace detail for the annual Waitrose Summer Party.
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Pippa Middleton with baking queen Mary Berry
She teamed the midi-length number – with pretty capped sleeves and a plain panel at the waist – with a pair of pointy nude heels and a matching beige clutch.
The beauty joined the likes of baking queen Mary Berry, TV presenters Ben Fogle and Steve Jones, plus radio host Lisa Snowdon at the summer bash.
She also mingled with TV personalities Kirstie Allsopp, Phillip Schofield and celebrity chef Gizzi Erskine.
Pippa, who writes a column in Waitrose Kitchen, the supermarket's magazine, recently revealed her top fashion tip for Royal Ascot race-goers in a new column for Vanity Fair.
The chic socialite, whose sister was recently named the most stylish British celebrity, has shared her own sartorial advice with readers.
Pippa Middleton mingles with Ben Fogle
"It is a busy day trying to fit in horse racing, betting, picnics and afternoon tea – oh, and avoiding sinking your heels into the grass," she says.
"I recommend wedged shoes – there's often a lot of walking. Some picnics are really elaborate, with white tablecloths and even real butlers!" Pippa added about the racing meet she attends every year.