Don Hertzfeldt is an American animator, writer, and independent filmmaker. He is a two-time Academy Award nominee who is best known for the animated films It's Such a Beautiful Day, the World of Tomorrow series, and Rejected. In 2014, his work appeared on The Simpsons. Eight of his short films have competed at the Sundance Film Festival, a festival record. He is also the only filmmaker to have won the Sundance Film Festival's Grand Jury Prize for Short Film twice.