Both couples will wed at St George’s Couple at Windsor Castle this year – Harry and Meghan on May 19 and Eugenie and Mr Brooksbank in October.
A source told The Sun that cousins Eugenie and Harry are very close and looking forward to being neighbours.
The source said: ‘Harry and Eugenie are great mates – she was one of the first people who met Meghan.
‘Eugenie is so pleased. It’s the first time she and Jack have lived together. They wanted to move in earlier but there were arguments over who paid for renovations.’