Lucas grew up traveling the South with his parents, who were antinuclear activists, and his three younger siblings. By the age of 13, he had lived in 30 different locations, including the Isle of Palms and Sullivan's Island, South Carolina. His mother attended Emerson College with Jay Leno. The family eventually settled in the town of Gig Harbor, Washington. He attended Kopachuck Middle School and graduated from Gig Harbor High School in 1989, where he acted in high school plays. After high school, he pursued his acting career over attending college.