21st on the horizon? Whether it’s your milestone or someone else’s, here’s what to wear to mark the occasion

12 Sep 2025

Turning 21 is a milestone worth marking with intention, and as such, it warrants a wardrobe that feels elevated yet effortless — whether you’re celebrating your own foray into adulthood or someone else’s.

From chic jewellery to statement dresses and sharp yet playful tailoring, the vibe should be fun and fabulous. Here, we share an edit of what to wear to mark the occasion in fitting fashion.

What To Wear

Step out in standout style with fun and fabulous looks guaranteed to steal the spotlight.

Sabrina Carpenter in Loewe
Millenia clip earrings from Swarovski
Acne Studios Gathered mini dress from Net-a-porter
Cassidy sandals from Cult Gaia
Magda Butrym Sheer draped mini dress from Mytheresa
Sweet Alhambra earstuds from Van Cleef & Arpels
Jimmy Choo 72138 sandals from Farfetch
Jessica McCormack Ball n Chain Diamond bracelet from Simon James
OLIVER SPENCER Linen Suit Jacket from Mr Porter
Versace Medusa silk tie from Farfetch
Large Link bracelet from Tiffany & Co.
OLIVER SPENCER Tapered Linen Trousers from Mr Porter
Casablanca Sacred Stone shirt from Farfetch
Dart-Knee pleated trousers from Porter James Sports
G75 sneaker from Gucci

YOU MIGHT ALSO LIKE

Van Cleef & Arpels’ joyful Perlée collection takes centre stage in our Winter Issue editorial

Turning 30? Consider our edit of what to wear to mark the occasion your go-to resource

Our autumn cover star Morgana O’Reilly on The White Lotus, juggling parenthood and ambition, and what comes next

Milestones

For exclusive, elegant celebrations of any scale, Kinloch Manor & Villas is the benchmark

Milestones

For exclusive, elegant celebrations of any scale, Kinloch Manor & Villas is the benchmark

Step inside Olivia Carter’s revelrous birthday bash at Soul
David Nash of The Wine Room guides us on how to gift wine wisely, and shares which bottles are sure to impress