Lady Kitty Spencer.Photo:David M. Benett/Dave Benett/Getty

Lady Kitty Spencer attends the launch of the Claridge’s Christmas Tree 2019 designed by Christian Louboutin at Claridge’s Hotel on November 21, 2019 in London, England.

David M. Benett/Dave Benett/Getty

Lady Kitty Spenceris a mom!

On Sunday, the 33-year-old niece ofPrincess Dianashared the surprise news in anannouncementon Instagram to markMother’s Dayin the U.K.

“It’s the joy of my life to be your mummy, little one. I love you unconditionally 🤍 Happy Mother’s Day to those who celebrate today 🤍,” she captioned the post.

Kitty Spencer

Their younger brother, Samuel Aitken, also commented on Kitty’s post with a single red heart emoji.

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Kitty’s happy news comes nearly three years after shetied the knotwith her husband Michael Lewis, 65, in Italy. The couple married in front of friends and family at Villa Aldo Brandini in Frascati on July 24, 2021.

Kitty Spencer Mother’s Day

Kitty Spencer Mother’s Day

Kitty and the millionaire fashion mogul also went on to honeymoon in Italy, a country that holds a special place in Kitty’s heart.

She studied in Florence for three years and told theLondon Evening Standardin 2021 that “the love and passion I feel for life is ignited in Italy. I hope to have a proper base there someday and it is certainly where I would like to retire.”

Charles Spencer.Amanda Edwards/WireImage

Lord Charles Spencer poses before discussing and signing copies of his book “Killers of the King : The Men Who Dared to Execute Charles I”

Amanda Edwards/WireImage

Kitty’s happy news comes as her father,Charles Spencer, is sharing theharrowing details of his time as a studentin a British boarding school in his new memoir,A Very Private School.

The 9th Earl Spencer’s memoir will be released on March 12.

source: people.com