Kate Middleton is known for her iconic sense of royal style, but very little is officially known about the Duchess of Cambridge’s beauty routine.

That’s why it came as a pleasant surprise when Middleton was spotted at Wimbledon on Tuesday holding a tube of what appears to be her current go-to brand of lip gloss.

kate middleton clarins lip gloss

Foto: Kate Middleton was spotted with a tube of Clarins lip gloss.sourceKarwai Tang/Getty Images

The duchess was photographed pulling out a tube of Clarins Instant Light Natural Lip Perfector, which currently retails for $26 but is sold out on the Clarins website at the time of writing. It appears that she opted for a subtle pale-pink shade called Rose Shimmer.

The gloss contains shea butter and mango extract and what the brand describes as "a delicate vanilla scent." It currently has four and a half stars on Ulta Beauty's site, with positive reviews calling it "great for a no make up look."

Read more: 3 barely-there beauty products that Meghan Markle's makeup artist swears by

kate middleton wimbledon

Foto: The lip gloss has "a delicate vanilla scent."sourceKarwai Tang/Getty Images

It's quite possible that the Queen is also a fan of the product, as Clarins is one of the few beauty brands she's given a Royal Warrant of Appointment.

A Royal Warrant is described as "a mark of recognition of those who have supplied goods or services to the Households of HM The Queen, HRH The Duke of Edinburgh or HRH The Prince of Wales for at least five years, and who have an ongoing trading arrangement." The Warrant allows the brand to display the Royal Arms in connection with the business, making it the closest the royal family gets to doing official product endorsements.

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The Rose Shimmer shade is currently sold out online at most major retailers, proving that the "Kate effect" is still in full force.