Mia swapped her rave gear—including the cool “charity shop” cargo trousers she wore to a Prada bash last week—for a more “grown-up and elegant” outfit suited to her red-carpet debut from the specialist rental site My Wardrobe HQ.
Rental was a natural choice for the teen who is an advocate of vintage and sustainable fashion. “When you buy a piece of clothing, you want to have it for a long time,” Regan explains. She’s no stranger to borrowing, either. Mia previously revealed to Vogue that she wore her mum’s old Vivienne Westwood shirts to school, and on a recent trip to New York, both she and her boyfriend Romeo Beckham shared a pair of Palace trousers.