Unlike Harry and Meghan's ceremony, however, it's unlikely that Eugenie's wedding will be televised-the princess isn't a full-time working royal and has a job in the art world.
The pair are set to marry at St George's Chapel in Windsor Castle in August of this year.
And the affection is clear with Eugenie's mum, Sarah "Fergie" Ferguson, taking to Instagram straight after the announcement to share photos from her personal album of the couple.
The couple posed for official portraits at Buckingham Palace earlier today, showing off Eugenie's massive pink sapphire ring. Prince Harry and his American fiancee Meghan Markle will marry at the same chapel in May.
Eugenie, 27, met Brooksbank, the 31-year-old manager of the nightclub Mahiki, while skiing in Verbier, Switzerland in 2010, having been introduced by mutual friends. Eugenie was still at Newcastle University at that time.
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The newly engaged couple have been dating for several years. She's now eighth in line for the throne.
Eugenie and Jack are to tie the knot there in the fall. Her other charitable work includes being Patron of the Elephant Family alongside her mother, Patron of the Teenage Cancer Trust alongside her sister, and Patron of the Coronet Theater and the European School of Osteopathy.
Jack now manages the Mayfair club Mahik.
The images also give royal watchers the first glimpse of the Princess's ring, which feature diamonds with a coloured centre stone. Brooksbank attended Pippa Middleton's wedding on May 20 and the Royal Ascot in June. A rep for Buckingham Palace confirmed that the twosome will Wednesday in the fall.
Mother of the would be Bride is on the seventh sky.
In three tweets - which were retweeted by the Duke of York - Sarah Duchess of York expressed her happiness at the news.