Need a quirky girl in your movie? Simple—just cast Zooey Deschanel. With her fringe bangs, doe eyes and ukulele always at the ready, Deschanel is the perfect (and popular) choice to play the offbeat, unconventional love interest. (See: 500 Days of Summer, Yes Man, and even her television show, New Girl.) She was a bit more serious in the Christmas flick Elf, but she was also blonde, so maybe it’s the hair that makes the eccentric girl.