If you have a Clyde in your life, a fun couple Halloween costume I've always wanted to try is Bonnie and Clyde. Admittedly, the movie has some slow parts, but I just watch it to admire Faye Dunaway in her fast-getaway tweeds and berets, and to admire Warren Beatty's, well, face. No doubt they were the coolest couple of 1967, and they have a timeless appeal.