• Amelia Spencer, daughter of Princess Diana's brother, Charles Spencer, is engaged to her longtime boyfriend.
  • Her father announced the news on Instagram, saying he's "so happy" about the news.
  • The announcement comes over a week after another royal, Princess Beatrice, quietly tied the knot in Windsor.

Do you hear that? That's the sound of royal wedding bells are ringing again. Amelia Spencer, daughter of Princess Diana's brother, Charles Spencer, 9th Earl Spencer, is now engaged. Her proud father announced the news on Twitter, posting a photo of the beaming bride-to-be and her fiancé, Greg Mallett.

"So happy for my daughter, Amelia, engaged to her boyfriend of 11 years, Greg," the Earl Spencer tweeted. "It’s wonderful to hear them both so excited about their future. Sending them both love, and every good wish for their life together. I love that Greg asked my blessing before proposing. Very sweet."

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Future groom Mallett also celebrated the news on Instagram, writing, "I asked the love of my life to spend the rest of her life with me and she said YES. Couldn’t be happier and I love you with all my heart @ameliaspencer15."

Amelia is one of Charles Spencer's four children with first wife Victoria Lockwood, including Lady Kitty Spencer, Lady Eliza Spencer (Amelia's twin), and Viscount Spencer. He also shares two children with Caroline Freud, The Hon Edmund Spencer and Lady Lara Spencer.

Though the newly-engaged Spencer isn't a working royal like her distant cousin, Prince William (she's also on the opposite side of the family), she's still appeared at some royal gatherings, like the Duke and Duchess of Cambridge's royal wedding in 2011.

the royal wedding
Anthony Devlin - PA Images//Getty Images
Lady Amelia (top) and Lady Kitty Spencer at the 2011 royal wedding in Westminster Abbey.

Congratulations to the happy couple!