Now that London temps have dropped to below 70 degrees, Pippa Middleton is upgrading her wardrobe from breezy sundresses and casual wedges to a sleeker look.

PHOTOS: Pippa's royal street style

The 28-year-old stepped out in a teal mini, black blazer and chic booties on Wednesday. She rocked a sleek ponytail instead of her usual loose waves and carried a black studded bag -- an outfit that could be considered almost too-trendy for the office. (Her current gig is at a geothermal energy firm in London.)

PHOTOS: How Pippa gets her fabulous figure

On Thursday, she went for a sexy lace shift dress, which she paired with another black blazer, tan envelope purse and matching ballet flats.

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