Seth and his wife, Bryce Dallas Howard, became the parents of son Theodore Gabel (b. Theodore Norman Howard Gabel, February 16, 2007).
Best friend and high school classmate of actor Josh Gad, who is godfather of Theo Gabel.
Attended New York University's Tisch School of the Arts.
He is of Ashkenazi Jewish descent on both sides of his family. He was raised under the Italian surname Cosentino, the surname of his stepfather who adopted him.
Second child, Beatrice Howard (Beatrice Jean Howard-Gabel), was born on January 19, 2012, weighing in at 8 lbs 6 oz.