Stavros Niarchos III, handsome heir to a shipping fortune reportedly worth $100 million, is dating Victoria’s Secret model, 28-year-old Jess Hart. The gap-toothed model is an expat Aussie with a vivacious personality who works hard to keep in shape.

When Mr. Niarchos is asked about her, he playfully remarks that she’s his sister. When she is asked if she’s planning to get engaged, she says: “Not any time soon.”

Hart moves in high society from Tatler circles to dinner dates on yachts and will feel at home with the shipping tycoon crowd.