The couple, who announced their engagement last November, have tied the knot in a "super-secret" ceremony, Us Weekly reports.
Brody, 34, and Meester, 27, starred together in the 2011 movie The Oranges and went public with their romantic relationship in February 2013. They're also co-starring in the upcoming film Life Partners.
Emails to the actors' reps were not immediately returned.
This is the first marriage for both.