The Scottish model and Formula 1 star have been linked since the summer of 2023
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NEED TO KNOW
- Rebecca Donaldson opened up about her boyfriend, Carlos Sainz, in a rare interview during the 2026 Formula 1 Miami Grand Prix weekend
- The Scottish model spoke with What People Are Wearing and revealed why the Williams Racing star is the best dressed out of all the F1 drivers
- She and Sainz were first linked in the summer of 2023
Rebecca Donaldson is keeping Carlos Sainz's fashion choices on track.
The Scottish model, 30, opened up about her boyfriend's personal style in a rare interview at the 2026 Miami Grand Prix and explained why she considers him the most fashionable Formula 1 driver on the circuit.
When asked who is the best dressed Formula 1 driver, Donaldson replied without hesitation. "This is easy this one," she told What People Are Wearing in the paddock at the Miami International Autodrome on Saturday, May 2. "Obviously Carlos Sainz, and obviously because I buy his clothes," she made clear.
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Donaldson, who was first linked with the Williams Racing driver, 31, in summer 2023, was then asked if Sainz's style was different before he started dating her. "Yes," she said with a laugh.
For the race week, Sainz kept his fashion choices casual. On Sprint Day, the Williams star wore a team shirt in white layered under another team shirt with a tropical palm tree print in shades of pink and dark hues reminiscent of a Miami sunset. He paired it with tan shorts.
To accessorize, he wore a backwards baseball hat in a matching tropical pink print, sunglasses and a wristwatch. He completed his look with white sneakers and matching tube socks with yellow stripes on the top of them.
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As for her own style, the model — who was wearing a chic tan top and brown skirt from Frankie Shop, a coordinating clutch from The Row, vintage Chanel sunglasses and an Audemars Piguet watch — described it as "simple," yet "quietly sexy."
The watch, in fact, was one of her most talked-about accessories while in Miami. "I've actually been getting lots of compliments on it this weekend," she shared. "I really love it."
When asked about her favorite beauty product, a few came to mind. There was one in particular, however, that she's been favoring the most. "There's this L'Oreal lip gloss," she said. "I've been using it every single day at the moment. It's really nice and super affordable."
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Sainz and Donaldson were first spotted together in Milan in June 2023, although they didn't show any PDA, per a post on Matthew J. Thompson's X account. Since confirming their relationship, the model has been seen supporting the driver at races around the world.
While she keeps her Instagram primarily career-focused, Donaldson has shared glimpses of her romance with Sainz. In September, she included a photo of the professional race car driver enjoying a boat-side excursion.
Outside of modeling and race life, Donaldson is also an entrepreneur. In October 2020, she launched her clothing company, Muse Activewear, which she previously described as “a diverse collection of comfortable, supportive gym wear that can also be transitioned to be worn in everyday life."
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