Princess Eugenie and Jack Brooksbank have been together for eight years.
The couple announced their engagement in January, shortly after Prince Harry and Meghan Markle revealed they would get married.
Both Eugenie and Harry are grandchildren of the Queen, and so will have lavish royal weddings.
But what can the body language of both couples in their engagement interviews tell us about their romances?
Princess Eugenie and Jack Brooksbank
Despite being the youngest royal couple to become engaged recently, this pair are most traditional.
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Judi said: “Eugenie & Jack presented as the most traditionally royal couple of the three, as opposed to the ‘sofa chemistry’ body language appearances of both Andrew & Fergie and Harry and Meghan.”
However, the pair are in the “rather bashful early stages of love.”
Judi said: “Jack in particular wore kind of the rounded and raised cheeks that signal genuine happiness and at times his cheeks even turned pink to show shyness too.
“Eugenie’s rather husky, sexy voice and her more assured body language suggests she will be the more powerful partner although she used several lowering signals to make her fiancé feel more dominant.”
Meghan Markle and Prince Harry
Judi claimed Meghan and Harry in comparison are “more A list Hollywood.”
Their sitting position makes their interview far less formal that Eugenie’s and Jack’s.
Judi said: “Being seated always suggests more leisurely and revealing discussion in a chat show format and we got just that from Harry and Meghan whose signals of sophisticated sexuality teamed with Meghan’s confidence and eloquence pitched them as more A list Hollywood than reserved royals.
“Meghan took over the questions with ease while Harry looked besotted and her body language responses to her husband-to-be ranged from devastatingly flirtatious to quasi-maternal, with some glances and strokes of reassurance and encouragement for Harry.
“Harry and Meghan’s mirroring was less intense though as they knew one another for less time than Eugenie and Jack’s seven year stint as a couple in love.”
Princess Eugenie’s wedding will cost the tax payer a certain sum, but do you know how much?
The wedding was initially reported to be low-key, with no obligations to invite certain guests and no carriage ride or big procession.
However, it is slowly getting more lavish, with it now set to cost the taxpayer around £2 million.
Meghan Markle was recently snubbed at an American TV awards show.
Meghan was nominated for the Choice Style Icon award.