Queen Camilla unveiled a striking new beauty enhancement during Wednesday's ceremonial welcome for Nigerian President Bola Tinubu and his wife Remi at Windsor Castle.
The 78-year-old monarch has been receiving semi-permanent eyebrow treatments from Suzanne Martin, a specialist beautician operating from The Lanesborough Club & Spa near Hyde Park Corner.
Ms Martin, known in beauty circles as the "Eyebrow Queen," shared a photograph of Her Majesty on Instagram, writing: "Our beloved Queen Camilla, always a pleasure! Thank you for trusting me."
The Prince and Princess of Wales joined the King and Queen for the state visit proceedings, where Camilla's fuller, more defined brows were prominently displayed.
Queen Camilla, 78, undergoes cosmetic enhancement for eye-watering £1,400
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The signature "Couture Brow" treatment carries a substantial price tag of £1,400 for the initial two-part procedure, with maintenance sessions costing £800 every eight to ten months.
Ms Martin applies a local anaesthetic before using microneedles to deposit mineral-based, hypoallergenic pigment beneath the skin's surface.
The technique creates fine, hair-like strokes that give the appearance of naturally fuller and more sculpted brows.
"Colours are blended to achieve the correct shade, then hair strokes are mimicked and drawn under the surface of the skin using a needle that is actually more like a sharp pen," Ms Martin explained.
Queen Camilla pictured at the State Banquet
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"The results are always perfectly natural."
Ms Martin described her approach to brow design as akin to a creative director working on couture fashion.
"Brows are the most powerful feature of the face, enhancing natural beauty and bone structure - and they deserve a truly bespoke, considered approach," she told the Mail.
The beautician emphasises that her semi-permanent technique allows the treatment to adapt over time.
King Charles and Queen Camilla at the State Banquet with the Nigerian president | GETTY"What works today might change tomorrow, which is why I use a semi-permanent technique that can truly evolve with your life, style and preferences," she added.
Royal friend Basia Briggs commented beneath Ms Martin's Instagram post: "Smashing that your brilliance is now public!"
Ms Martin's celebrity clientele includes pop stars Ellie Goulding and Dua Lipa, and she has spent over a decade working discreetly with high-profile clients.
The Queen's embrace of cosmetic treatments marks a departure from her late mother-in-law's approach.
Queen Camilla wore a cream gown designed by Fiona Clare | GETTYQueen Elizabeth relied primarily on traditional skincare and makeup throughout her reign.
Camilla has long favoured natural, non-surgical beauty procedures.
For nearly 20 years, she has been a devotee of Deborah Mitchell's "bee sting facial," which uses bee venom as a natural tightening alternative to Botox and costs up to £120 per session.
Ms Mitchell's Heaven and Beauty range received a royal warrant from Camilla in 2024.