I have to admit, God help me but I like the Lindsay Lohan idea. Even though I have not seen anything that she had starred in, she just has a quality about her--OK two qualities
two big qualities--that makes her very appealing and charming. And the freckles help, too. I'd like to see them use a younger Indy and Marion in the pre-adventure, see how they met, or how they ended up having the affair when she was a teen. Lohan could pull that off, I think.
Mandy Moore's not a bad idea, either. Maybe Anne Hathaway.
I'd like to see an up and coming actress play a young Marion...for example Elizabeth Banks, who plays J.J. Jameson's secretary in "Spiderman 2" :
http://www.imdb.com/name/nm0006969/
Or Caroline Dhavernas, who had a short lived series this year on Fox called "Wonderfalls", which was a very good show that was mishandled in typical Fox fashion:
http://www.imdb.com/name/nm0223518/