They have known each other since 1990, when LePere joined the designer's company as an intern.
Kors and LePere were spotted at the city clerk's office in Manhattan on Wednesday. A representative for Kors confirmed that the couple received a marriage license.
"Lance and I are very excited to finally be able to have the opportunity to marry in our home state after many years together," Kors said. "We have no plans for a major party, but we will be getting married privately."