Rest in peace, Tara Palmer-Tomkinson.

The socialite and close royal family friend was laid to rest in a private funeral on Monday, Feb. 27 after she sadly died at age 45 on Wednesday, Feb. 8. According to her older sister, author Santa Montefiore, Tara died from a perforated ulcer and was also battling a brain tumor.

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"My darling Tara, I hope you know how much we miss you. From the moment you were born we were a family of five, but now we are four and that just isn’t right," Montefiore wrote in an emotional eulogy for Tara, recently published on her Facebook page. "I hope you know that we love you, with all our hearts, we really do."

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Tara at William and Kate's royal wedding in 2011.

Tara grew up as a friend of the British monarchy and was Prince Charles's goddaughter. Her parents, Charles Palmer-Tomkinson — a wealthy landowner and former Olympic skier — and Patricia Palmer-Tomkinson, are longtime friends of Prince William's father.

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She was also close to Sarah Ferguson, Duchess of York and her extended family. She previously attended both Prince Charles and Camilla, Duchess of Cornwall's April 2005 wedding and William and Kate Middleton's lavish royal wedding at London's Westminster Abbey in April 2011.

Following her passing, Charles and Camilla said in a statement that they were "deeply saddened" by Tara's death. Fergie additionally released a statement about her late friend.

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Tara at Charles and Camilla's 2005 wedding.

"The York Family are so shocked by this tragic news of the magnificent, beautifully energetic soul of Tara," Fergie said in a message obtained by People. "My mother, Susie Barrantes, was her very proud godmother, and she adored her. We are all deeply shocked and saddened and send all our love and strength to the family in Dummer, [England]."

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Last year, Tara — who appeared on the British reality show I'm a Celebrity…Get Me Out of Here! in 2002 — reportedly received treatment for a non-malignant brain tumor and underwent a successful surgery.

She is survived by her parents, sister and brother, James Palmer-Tomkinson. Our thoughts are with Tara's family and friends during this difficult time.