Born in England but raised in Botswana, Lubomirski is a celebrity and fashion photographer who has worked with magazines including Vogue and Harper's Bazaar.
Lubomirski is also a prince himself as he is descended from a wealthy Polish family who were given the hereditary title of prince of the Holy Roman Empire in the 17th century.
Lubomirski's official title is His Serene Highness Prince Alexi Lubomirski.
Celebrities he has previously photographed include Katy Perry, Sarah Jessica Parker, Jennifer Aniston, Nicole Kidman, and Scarlett Johansson.
He also trained with Mario Testino- the photographer who shot Prince William and Kate Middleton's engagement portrait.
Lubomirski has previously said taking the photos of Prince Harry and Ms Markle for their official engagement was one of the most joyful jobs of his career.
"They were so deliciously in love," he told E! News.
It has been reported that Lubomirski and his Giada will also attend the ceremony as guests.
About 600 people have been invited to the wedding.