Clinton, 29, of course, is the former first couple's only child. Mezvinsky, a banker and fellow Stanford alumnus, is the 31-year-old son of former Iowa congressman Ed Mezvinsky and former Pennsylvania congresswoman Marjorie Margolies-Mezvinksy. The two announced their engagement over Thanksgiving, which they spent in New York.
On Friday, the pair sent out an e-mail to friends and family, saying: "We're sorry for the mass email but we wanted to wish everyone a belated Happy Thanksgiving! We also wanted to share that we are engaged! We didn't get married this past summer despite the stories to the contrary, but we are looking toward next summer and hope you all will be there to celebrate with us. Happy Holidays! Chelsea & Marc."
Clinton works at a Manhattan hedge fund. Last year, Mezvinsky gave her a Yorkshire terrier named Soren as a gift.