Pippa, 40, was seen ahead of the match between Italy's Lorenzo Musetti and Serbia's Novak Djokovic wearing the gorgeous 'Mimi' jumpsuit from Claire Mischevani.
The jumpsuit featured a cinched waistline and flared wide-leg trousers. The garment also had short bell sleeves and an open neckline with buttons down the front for an extra element of visual interest.
The Princess' sister styled the bold printed number with a raffia clutch bag from J. Crew and added to the cool 60s appeal of her jumpsuit by donning a pair of tan platformed espadrilles.
Adding the finishing touches to Prince William 's sister-in-law's look were a Rolex watch, a gold pendant from Tiffany & Co, and a pair of hooped earrings. She also looked her sister's double in a pair of tortoiseshell sunnies.
The columnist wore her dark brunette locks in loose waves and she wore a smokey brown eye that we are sure Kate would approve of.
Meanwhile, her husband James Matthews , the brother of Made in Chelsea star Spencer Matthews , wore a neutral linen suit with a pale blue shirt and printed navy tie.
The Middletons at Wimbledon
Pippa isn't the only member of the Middleton family to make an appearance at Wimbledon this year.
While it was announced that the Princess of Wales will make a return to present the winner's trophy on Sunday, the pair's parents have attended twice this year.
Carole Middleton looked sublime in a floral midi dress from Cefinn on day four which was styled with a white cropped jacket from Me + Em, yellow sunglasses from Izipizi, and the 'Josie Saddle Suede Low Block Heel Pumps' from Emmy London.
Meanwhile, on day 10, Prince William's mother-in-law wore a floral Me + Em dress, styled with a striped blazer from the same brand and re-wore her Emmy London pumps. Kate and Pippa's father, Michael Middleton , was also in attendance on both occasions.
Pippa's stylish outing
The royal's rarely-seen sister last made a public outing last December when she attended her sister's Together At Christmas Carol Service at Westminster Abbey.
Pippa looked chic in a belted burgundy tweed jacket and matching cigarette trousers from Saloni with black heels and a matching clutch. She added a black sweater for extra warmth and style.
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