Mark your calendars! There’sanotherroyal wedding in the works — and there will likely be a famous ex-girlfriend in attendance.

Buckingham Palace announced on Wednesday thatLady Gabriella Windsorisengagedto Thomas Kingston. The groom-to-be proposed last month on Sark, one of the Channel Islands just off the coast of France, and the couple’s big day will take place in spring 2019.

Lady Gabriella, known as “Ella” to her friends and family, is not as well known as some other members of the royal family. She is the daughter of one ofQueen Elizabeth‘s cousins,Prince Michael of Kent, meaning both Gabriella andPrince Charleshave King George V and Queen Mary as their great-grandparents.

The 37-year-old iscurrently 51st in the line of successionto the British throne, behind herfather, older brotherLord Frederick Windsorand her two young nieces,MaudandIsabella Windsor.

Queen Elizabeth II’s Birthday Parade: Trooping The Colour

Royal fans likely recognize Lady Gabriella from her outings with the royal family. Since she was a youngster, she has been a regular on the balcony of Buckingham Palace at Trooping the Colour, the annual parade celebrating the monarch’s birthday.

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Beulah flagship store launch, London, UK - 16 May 2018

Gabriella now works as a Senior Director at Branding Latin America, a brand-positioning platform that specializes in the region. She also contributes to theLondon Magazineas a writer.

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Michaels Of Kent And Frederick And Gabriella

Kingston, who works in frontier market investment and is a Director of Devonport Capital, had a connection to the royal family before starting his three-year romance with Lady Gabriella: He previously datedKate Middleton‘s younger sister,Pippa Middleton!

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Cheltenham Festival. - 14 Mar 2013

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Wedding of James Matthews and Pippa Middleton, St Mark’s Church, Englefield, UK - 20 May 2017

Despite ending their relationship around 2011, Pippa (who iscurrently expecting her first childwith husband James Matthews) and Kingston remained friends throughout the years. In fact, Kingston and Lady Gabriella attended Pippa’s May 2017 wedding — a strong hint that Pippa could be among the famous faces supporting the couple when they tie the knot next year!

source: people.com