The former first daughter and Marc Mezvinsky have been close since their teens, when their parents hobnobbed in D.C. (his dad is former Iowa Rep. Ed Mezvinsky), and both attended Stanford – but lately their bond has blossomed.
First spotted together at the opening of TAO Las Vegas in October, they went public with their romance recently in N.Y.C., where they went to a premiere after-party Nov. 1, cheered on marathoners Nov. 6 and snuggled at a U.N. gala Nov. 9.
A friend says Clinton, 25, who split with Ian Klaus this summer, seems "very happy." Adds another Clinton pal: "They’re best friends who fell in love."
Mezvinsky, 27, who works at Goldman Sachs, is "goofy and laid-back," says a source close to both. "He’s good for her."