Princess Charlotte of Monaco is dating a rich English property heir.

Charlotte Casiraghi - the daughter of Princess Caroline and Italian industrialist Stefano Casiraghi - has been enjoying a romance with Alex Dellal, the 23-year-old grandson of multi-millionaire property tycoon Jack Dellal.

A source told Britain's Daily Mail newspaper: "Charlotte and Alex both move in elite, jet-set circles and were introduced through mutual friends. They just clicked and have been dating for a couple of months."

"She lives in Paris and he is working in London. But they fly back and forth to see each other every couple of weeks."

Earlier this year, 20-year-old Charlotte split from her boyfriend of three years Felix Winckler, the son of a Brussels-based international attorney.

Charlotte is currently cruising the Mediterranean on her mother's 118ft yacht and was spotted last week partying with friends at Ibiza's Pacha nightclub.

A source claimed: "At about 6am she was led out bleary eyed by a young male friend. She looked like she needed to go to bed."