The wedding took place Saturday at the Quaker school, People said. It is the first marriage for both.
The couple, engaged in July 200, is expecting their first child.
Pete, 34, appeared in movies such as "Syriana," "The Whole Nine Yards," and "The Whole Ten Yards" and stars in the NBC drama "Studio 60 on the Sunset Strip."
Benioff, 36, wrote screenplays for "25th Hour" and "Troy" and has four films due coming out in the next two years.