Elin, who divorced cheating golf great Tiger Woods following a series of scandals with multiple women, has been dating Dingman, the son of billionaire Michael Dingman, for months.
In the mid-1990s, he specialized in Russian private equity funds. He also owned an Indy car-racing team sponsored by World Childhood Foundation, a charity founded by Queen Silvia of Sweden.
The charming bachelor has previously dated Bridget Moynahan, mother of Tom Brady's baby. He was linked last year to Princess Madeleine of Sweden, but sources tell us they were just friends.
Friends say he and Elin met at the Red Cross Ball in Florida last January attended by Princess Madeleine.
"He's never been so happy. He and Elin have strong feelings for each other," a friend said. "He's a classic all-American guy. He's handsome, a total gentleman and low-key. He's never been in the press. Elin's a very lucky girl; he's a great guy but very private."
The source added, "He doesn't play golf."