Kaitlin Cooper – The O.C.

Now she’s a pretty big star, but before that, Shailene Woodley originally played Kaitlin Cooper on the steamy drama The O.C. before her role was handed to Willa Holland. The character had a recurring role in the first three seasons before becoming a regular in the last season.

Josh Schwartz, the creator of the show, explained that they replaced Woodley because the version of the character that they were going to bring back was older than Shailene would’ve been able to achieve on her own.