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The Billion-Dollar Paddock: 7 Shocking Facts About Carlos Sainz's Girlfriend, Rebecca Donaldson

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Formula 1 driver Carlos Sainz Jr. has long been known for his intense privacy, but his relationship with Scottish model and entrepreneur Rebecca Donaldson has finally brought a new level of glamour to the paddock. As of December 23, 2025, the couple remains one of the most talked-about pairings in the sport, solidifying their status after a year and a half of dating that followed the Spanish driver's highly publicized split from his long-term partner.

This article dives deep into the life of Rebecca Donaldson, revealing her impressive career, her entrepreneurial success, and the details of her high-profile dating history that made headlines long before she started supporting the "Smooth Operator" at Grand Prix circuits around the world. We also detail the current status of Carlos Sainz's F1 career, providing the most up-to-date information for late 2025.

The F1 Star: Carlos Sainz Jr. Complete Biography

Carlos Sainz Vázquez de Castro, known as Carlos Sainz Jr. or the "Chili," is one of Spain’s most celebrated racing drivers. His career trajectory, from a Red Bull Junior to a Grand Prix winner, is a testament to his skill and determination.

  • Full Name: Carlos Sainz Vázquez de Castro
  • Date of Birth: September 1, 1994
  • Age (as of Dec 2025): 31
  • Place of Birth: Madrid, Spain
  • Nationality: Spanish
  • F1 Debut: 2015 (with Toro Rosso)
  • F1 Teams: Toro Rosso (2015–2017), Renault (2017–2018), McLaren (2019–2020), Ferrari (2021–2024)
  • Current F1 Team (Late 2025): Ferrari (contracted until the end of the 2024 season, but still racing in 2025)
  • Future F1 Team: Williams (Confirmed move for the 2026 season, a major talking point in late 2025 F1 news)
  • Notable Career Highlights: Multiple Grand Prix wins, including his maiden victory, and a key role in Ferrari's recent campaigns.
  • Family: Son of rally legend Carlos Sainz Sr., a two-time World Rally Champion and three-time Dakar Rally winner.

Rebecca Donaldson: Model, Entrepreneur, and F1 Paddock Star

Rebecca Donaldson is far more than just an F1 WAG; she is an accomplished Scottish model and a successful entrepreneur with a clear business vision. Her presence in the paddock, often seen supporting Sainz, has brought her a new level of global recognition.

7 Key Facts About Carlos Sainz's Partner

Here are the most important and intriguing details about Rebecca Donaldson's life and career:

  1. She is a Successful Entrepreneur: Donaldson is the founder of her own activewear brand, "Muse Activewear." The brand focuses on creating sustainable and high-quality fitness apparel, showcasing her business acumen beyond the runway.
  2. Her Estimated Net Worth is Significant: Combining her income from high-profile modeling contracts and her activewear brand, her net worth is reported to be around $1.5 million. This establishes her as a financially independent and successful figure in her own right.
  3. She Started Modeling at a Young Age: Hailing from Scone, Scotland, Donaldson began her modeling career at the age of 17 after winning a beauty contest. This early start paved the way for her later success with major agencies.
  4. She's Signed with Elite Agencies: Rebecca has been represented by prestigious agencies, including M±P and Elite Models New York, a testament to her standing in the fashion industry.
  5. She Has Worked with Global Luxury Brands: Her portfolio includes high-profile campaigns for luxury and fashion giants such as Ted Baker, Luella Gray, Garrard, Swarovski, Tiffany & Co, Ralph Lauren, and Kérastase.
  6. She Has a High-Profile Dating History: Before her relationship with Sainz, Donaldson briefly dated reality TV star Scott Disick in 2022, with the pair making a red-carpet debut together. She has also been linked to other celebrities like Jack Harlow and Travis Barker.
  7. She is a Regular Fixture in the F1 Paddock: Since her relationship with Sainz became public, she has frequently been seen in the F1 paddock, supporting him at races like the Australian Grand Prix and the Las Vegas Grand Prix in 2025, and often traveling with his family.

The Secret Timeline: From Public Split to New Romance

The relationship between Carlos Sainz and Rebecca Donaldson began after a significant change in the F1 driver's personal life, making their romance a hot topic of conversation among fans and media. Their relationship is characterized by a high degree of privacy, with the couple rarely speaking publicly about their romance.

The End of a Long-Term Partnership

For several years, Carlos Sainz was in a stable, long-term relationship with Spanish journalist and stylist Isabel Hernaez. Their relationship was highly private, but they were a recognizable couple in the F1 world. Reports of their split emerged in the first half of 2023, marking the end of a partnership that spanned over seven years.

The New Chapter: Summer 2023

The first reports linking Carlos Sainz and Rebecca Donaldson began circulating in the summer of 2023. The couple was initially spotted together in Italy and later photographed on a yacht vacation, sparking rumors that quickly confirmed their new relationship.

Solidifying the Relationship in 2025

The year 2025 proved to be a pivotal year for the couple, both personally and professionally for Sainz. Despite the intense pressure surrounding Sainz's future move to Williams, Donaldson's presence in the paddock grew more consistent. She was seen supporting him at major events like the Australian Grand Prix in March and celebrating his successes, such as a Top 3 result at the Las Vegas Grand Prix later in the year.

Their continued public appearances and the comfort they show in each other's company, even while maintaining a discreet profile, indicate a serious and stable partnership. The couple often travels together, welcoming the new year and enjoying private getaways, which suggests a strong bond away from the media spotlight.

Rebecca Donaldson's Impact on the F1 Paddock

Rebecca Donaldson is a key figure in the new generation of "F1 WAGs" (Wives and Girlfriends) who are successful professionals and entrepreneurs in their own right. Her stylish presence and career achievements bring a unique dynamic to the F1 social scene.

Her fashion background means she is a frequent front-row guest at global fashion weeks, and she consistently brings a high level of style to the F1 paddock. This blend of high fashion and high-octane racing mirrors the modern image of Formula 1—a sport that is as much about glamour and global brands as it is about speed and engineering.

As Carlos Sainz navigates the final stages of his time with Ferrari and prepares for his highly anticipated move to Williams, the support of a successful partner like Rebecca Donaldson is undoubtedly a significant asset. Their relationship continues to capture the attention of fans worldwide, making them one of the most compelling power couples in the world of elite sports.

The Billion-Dollar Paddock: 7 Shocking Facts About Carlos Sainz's Girlfriend, Rebecca Donaldson
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