Jefferson, also known as the Mad Hatter, is a character on ABC's Once Upon a Time. He débuts in the seventeenth episode of the first season and is portrayed by guest star Sebastian Stan. He was the husband of Priscilla and the father of agirl named Grace.
Jefferson is based on the Hatter from the novel, Alice's Adventures in Wonderland, and the Mad Hatter from the Disney film Alice in Wonderland.