The O.C. was perhaps the most popular teen series of its time when it was first aired in the early 2000s and centred around the lives of Marissa Cooper, Ryan Atwood and their friends Seth Cohen and Summer Roberts.

It wasn’t until the fourth season of the show that the role of Marissa’s younger sister Kaitlin became much bigger and it was quite noticeable that the actress who played her had been switched. The role was originally given to Shailene Woodley throughout season one, but when she returned from boarding school and was given a much bigger role in the show, the role was instead switched to Willa Holland. Woodley went on to star in The Secret Life of The American Teen and is a Golden Globe-nominated actress for her role in the Divergent Series, so she won’t feel too disheartened about this recast.