Jim Carrey
Bruce Almighty was an instant hit and producers were eager to do a sequel. Carrey immediately turned down the role, which forced producers to create Evan Almighty, which is a classic in its own right. Carrey basically said that he turned it down because he doesn't like sequels. "I find sequels are a function of commerce for the most part. At least the two I've done, they were characters I enjoyed doing, but I did find myself parroting myself at that point."