London, UK - After weeks of feverish speculation over her long absence from the public eye, Princess Kate Middleton revealed in a shock video statement that she is undergoing chemotherapy after being diagnosed with cancer.

Kate's cancer was discovered during her abdominal surgery back in January, and she addressed the devastating news in a video recorded at Windsor Castle with help from the BBC.

"The surgery was successful," the Princess of Wales said, "however tests after the operation found cancer had been present."

"My medical team therefore advised that I should undergo a course of preventative chemotherapy, and I'm now in the early stages of that treatment."

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Kate briefly referenced the widespread concern that her absence from the public had sparked, noting that she and William are "doing everything we can to process and manage this privately for the sake of our young family."

"We hope that you'll understand that, as a family, we now need some time, space, and privacy while I complete my treatment," she added, ending off the video by asking for anyone who has been affected by cancer not to lose faith or hope.

"You are not alone," she said.

As a future queen consort and the mother of the future king, Prince George, her diagnosis strikes right at the heart of the institution. Her father-in-law King Charles III has also been battling cancer.

The White House wished Britain's Catherine, Princess of Wales, a full recovery on Friday after the "terrible" news of her cancer diagnosis.

"All of us just heard the terrible news. Our thoughts are with the Duchess of Cambridge and her family and friends during this incredibly difficult time," White House Press Secretary Karine Jean-Pierre told reporters.

"Certainly we wish her a full recovery. And I think it's important that we respect their privacy, especially at the time."

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Jean-Pierre also said that she did not have "anything to share at this time" about whether President Joe Biden had spoken to the princess.

"We are taking this in news as all of you are," Jean-Pierre added.