3. Claudia Wells/Elizabeth Shue - Jennifer Parker
I can't believe I'm writing an entry on this list in which I suggest Elizabeth Shue did something wrong, but here's a casting replacement that has always bugged me, though it might not have been our replacement actor's fault entirely. In the original
Back to the Future, Claudia Wells was cast as Marty McFly's super hot love interest Jennifer Parker. She was written, I imagine, to be the epitome of awesome movie girlfriends - and Claudia pulled it off brilliantly, despite the fact she has, like, eight minutes of screentime in all. When Robert Zemeckis decided it was time to make
Back to the Future Part II, Claudia Wells was unable to return to fill her role because her mother was ill at the time, and she wanted to take care of her (fair enough). So the director cast Elizabeth Shue instead, who - for some reason - plays Jennifer completely and utterly different. "Stupidly," is probably the right word, but I don't want to be too harsh. Shue is a great actress, and I think the script is much to blame, but this character genuinely shifted from sexy and cool to immature and annoying.