Sarah Ferguson honored her late friend Lisa Marie Presley at the memorial service for Elvis Presley’s only child on Sunday. Princess Beatrice and Princess Eugenie’s mother quoted Queen Elizabeth, who passed away last year, in her remarks at “Lisa Marie’s Celebration of Life.”

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“Sissy this is for you with affection,” Sarah said at the service held at Graceland in Memphis, Tennessee. “My late mother-in-law used to say that nothing can be said, can begin to take away the anguish and the pain of these moments, because grief is the price we pay for love. And how right she was.”

Queen Elizabeth famously said “grief is the price we pay for love” in a message following the Sept. 11 attacks in 2001.

Lisa Marie died at the age of 54 on Jan. 12 after being rushed to the hospital. Following her passing, the Duchess of York penned a tribute to her “sissy” on Instagram.

“I say hello to you everyday and I love you my sissy and I will continue to say hello to you everyday. You were my sissy, an amazing mother to Ben, Riley, Harper and Finley and a superbly loving daughter to Priscilla,” Sarah wrote alongside a photo of her and Lisa Marie.

She added, “You have been my devoted friend for many years and I am here for your family to support and love them. I am deeply saddened my sissy, you are in my heart.”