The Duchess of Cambridge's younger sis made the most of the sunshine and channelled her inner 40s fashionista in the little mint coloured tea dress that featured ruched sleeves, a plunging neckline and was emblazoned with cutesy pink bouquets.
When it came to her hair and make-up, Pip kept to the fresh, ethereal theme and wore her locks in feathered waves which framed her face. One slick of nude lipstick and a dusting of blusher on the apples of her cheeks was enough to bring out her enviable sun-kissed glow as she watched the game unfold.
But it's not just us who is impressed with Ms. Middleton's sweet style...
Fashion designer Tommy Hilfiger recently admitted that he has been won over by Pippa's preppy fashion sense, and the fact that she can pull off relatively anything means he is desperate to make her the face of his brand.
Talking to US HELLO! last month, Tommy said, "I was with Pippa last night in London and she's a candidate for Tommy Hilfiger. She's not as under the microscope [as Kate]."
Tommy also revealed that he has sent Pippa a whole hoard of designs in the hope that she'll incorporate them into her already super-stylish wardrobe. "I sent the preppy casual summer dresses and things like that," he said. "I hope she wears them.
We haven't noticed Pip wearing any of Tommy's attire for her appearance on the court just yet - but there's still time!
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