The elegant 24-year-old was first spotted in the afternoon in a simple yet chic blue shift dress for the preview of the Frieze art fair, which she paired with some black ankle boots.
Princess Eugenie chose a blue dress for her first outing on Tuesday
Eugenie kept her accessories to a minimum, choosing a leather handbag and completing the look with a silver ring.
The young royal was the epitome of an English rose with barely-there make-up, save for some striking black eyeliner and mascara for a perfect laidback chic beauty look.
Later that evening, the Princess changed into a different outfit as she headed to a preview of Fabien Baron's Monuments at Sotheby's, hosted by Moncler.
Rocking a classic little black dress, Princess Eugenie channelled autumn chic as she added a striking navy blue coat, paired with some black ankle boots.
The Princess channelled autumn chic in a navy blue coat
The stylish Princess once again kept her accessories to a minimum, opting simply for a cream and red woven box clutch bag to add a pop of extra colour to her outfit.
Currrently working in New York City, Eugenie often jet-sets between the US and the UK, however recently her travels saw her heading to Italy with Prince Harry to celebrate their friend Charlie Gilkes' wedding.
The Princess opted for a bright red and orange dress for the nuptials, where she was joined by her boyfriend Jack Brooksbank, as well as other guests including the Duchess of Cambridge's sister Pippa Middleton and their mother Carole Middleton.