Misha Nonoo, who reportedly separated from old Etonian Alexander Gilkes recently, is a close friend of the Suits star and holidayed with her in Spain over the summer.
She was also in the UK, posting photographs from the Royal Enclosure at Ascot to her Instagram account in June.
Misha Nonoo is a close friend of the Suits actress
The New York-based designer is very well connected in royal circles and counts Princess Eugenie among her friends since her time working for Alexander's upmarket Paddle8 Auction firm in the US.
Alexander was a guest at the 2011 Royal Wedding of the Duke and Duchess of Cambridge and his younger brother Charlie is a former flame of Pippa Middleton.
Prince Harry and Meghan Markle have been secretly dating since the summer
Eugenie and her sister Princess Beatrice along with James Middleton were guests at his lavish three-day wedding to Misha in Venice in August 2012.
Harry is known to be very close to his cousin Eugenie, who also remains friendly with his last serious girlfriend Cressida Bonas.
Tapas y tiles with my @mishanonoo #MMMinMadrid #eatpraylove #madrid #spain
A photo posted by Meghan Markle (@meghanmarkle) on
Meghan and Misha in Madrid earlier this year
Misha is a CFDA/Vogue Fashion Fund finalist and fans of her eponymous line include Emma Watson and Cate Blanchett as well as her close pal Meghan.
HELLO! have contacted Misha's representative for comment.