What All The Cast Members Of 'The O.C.' Are Up To Now
Willa Holland played Marissa's younger sister, Kaitlin. While Marissa gravitated toward her dad, Kaitlin was definitely cut from the Julie Cooper cloth. A bit of a wild child with a major attitude, Kaitlin matures as the series progresses. Fun fact: Kaitlin's character was played by Shailene Woodley in the first season.