Dennis Barton Dugan is an American film director, actor, and comedian. He is known for directing the films Problem Child, Brain Donors, Beverly Hills Ninja and National Security, and his partnership with comedic actor Adam Sandler, for whom he directed the films Happy Gilmore, Big Daddy, The Benchwarmers, I Now Pronounce You Chuck & Larry, You Don't Mess with the Zohan, Grown Ups, Just Go with It, Jack and Jill and Grown Ups 2.
