[Crazy Jetty]

One of the biggest complaints fans can have with an adaptation comes in the form of miscasting. Casting choices really can make or break a movie, especially with the hardcore fans.

What movies do you think were hurt in the longrun by poor casting choices, and what actors/actresses do you feel would have been much better?

I'll start off with Green Lantern, Starring Ryan Renolds and Blake Lively as Jordan and Ferris.
Renolds, I do not hate him as much as other fans do. I don't think he's a bad actor, and in the correct roll he's pretty brilliant (Accurate Deadpool, anyone?). I just don't think he's a very good choice for Hal Jordan (I'd have had no complaints at all were he cast as Kyle Rayner).
Lively on the flip side, also doesn't annoy me nearly as badly as others. However, she's still not a great choice. There are other actresses which fit the part, and are much better at their craft.

My choices-
Hal Jordan: Nathan Fillion. Best known from his work Mal on Firefly, to me he's like Patrick Stewart to Professor X. There really is no other choice.
Carrol Ferris/Star Sapphire: Lake Bell. She'd be best known here as the lead actress in NBC's Surface. I remembered her from recently rewatching it on DVD, and realized she'd have been a brilliant choice for Ferris/Sapphire.

Lake Bell was what put the idea of this thread in my head, and after thinking about it, I'd love to hear what others come up with for not just GL, but all the TV and Movie adaptations out there.
Makes me wonder who feels whom was miscast, and if there are indeed better choices.