Princess Leonor of Spain has quite the fashion act to follow. Her mother, Queen Letizia, is one of Europe’s most consistently stylish royals, with a wardrobe that runs the gamut from razor-sharp tailoring and elegant eveningwear to more relaxed, off-duty staples. But the 20-year-old heir to the Spanish throne is steadily establishing a sartorial identity of her own—and, judging by her recent appearances, she's developing a particular knack for fall dressing.

The eldest daughter of King Felipe VI and Queen Letizia, Leonor de Borbón y Ortiz became first in line to the Spanish throne when her father ascended in 2014. She is the older sister of Infanta Sofía, and granddaughter of former King Juan Carlos I and Queen Sofía.

As the Princess of Asturias, Leonor has increasingly taken on a more prominent public role, balancing royal engagements with her military training. And with those growing responsibilities has come an increasingly assured wardrobe, one that mixes Spanish designers, youthful silhouettes, and the occasional piece borrowed from the family jewelry box.

Her latest appearance saw the princess step into some practical and polished fall style. Visiting the coastal town of Llanes in Asturias with her family, the princess embraced the season’s earthier palette in a dark olive-green funnel-neck parka from Mango, its roomy patch pockets, flared sleeves, and slightly cropped silhouette lending a modern edge to the utilitarian staple.

Beneath it, she layered a navy V-neck cashmere sweater from Falconeri over dark-wash jeans, finishing the look with pointed-toe brown suede boots from LMDI Collection. A selection of delicate rings, including pieces from CXC, PDPAOLA, and Suma Cruz, added a little shine, while her hair was swept into a loose braid with face-framing strands.

Royal style needn’t always mean dressing up—just look at boots, blazers, and gilets that Catherine, Princess of Wales so loves.

Just a day earlier, Princess Leonor got more formal at the Princess of Asturias Awards in Oviedo. For a reception ahead of the ceremony on October 23, she chose a coral-pink double-breasted suit by Spanish label Mirto, its relaxed, slightly louche tailoring bringing a youthful ease to the older buttoned-up royal archetype.

Worn with a coordinating waistcoat, it was a look that wouldn’t have seemed out of place in her mother’s wardrobe. After all, Queen Letizia has long been an advocate for the power suit.

For the evening’s official ceremony, Leonor changed into a short-sleeved, ankle-length burgundy dress from Hannibal Laguna White, a Venezuelan lavel, styled with crystal-embellished Carolina Herrera slingback pumps and a coordinating red suede clutch by Magrit, borrowed from her mother. The most significant accessory came courtesy of her grandmother.

Leonor wore a pair of ruby-and-diamond drop earrings belonging to Queen Sofía, part of her treasured Niarchos ruby jewelry collection. The jewels date back to Sofía’s 1962 wedding to the future King Juan Carlos, with the wider suite gifted by Greek shipping magnate Stavros Niarchos and the matching earrings reportedly presented by her mother, Queen Frederica of Greece.

Queen Sofía is understood never to have loaned pieces from the collection to other family members before, making Leonor’s choice an especially meaningful passing of the sartorial baton.

Leonor’s style is not all ceremony, however. At the Spanish Grand Prix in Madrid this past September, she repped a more easygoing kind of royal dressing in a softly ruched blush-pink sleeveless top by Spanish label Coloma’s, worn with wide-leg white pants and wedge espadrilles from Mint & Rose, as well as a Tiffany & Co. Open Heart necklace. Easy, breezy, youthful, and perfect for a late-summer sporting outing.

Across these appearances, a few signatures are emerging for the soon-to-be 21-year-old. She has a definite preference for Spanish brands, as well as an affinity for clean tailoring, and a knack for balancing classic wardrobe pieces with something a little more contemporary.

There are certainly echoes of Queen Letizia’s style in the mix, not least in Leonor’s fondness for a well-cut suit and her willingness to revisit accessories already in the royal wardrobe. But the younger royal is beginning to put her own stamp on things, too.

From a slouchy parka and suede boots to a color-popping suit and generations-old rubies, Princess Leonor is proving that a future queen’s wardrobe can have plenty of range.