Diane in Touched by Love
It would probably be hard to find (maybe Netflix) but if you like Diane Lane, you should see Touched by Love. It was made before this movie, I think, and she plays a mentally & physically disabled child. The acting by others is kind of over the top, but Diane Lane is OUTSTANDING in this role.
It's based on a true story about a girl that loved Elvis Presley (set in the 60's) & her teacher got her to write him and he wrote back for a long time & sent her presents. It's really a neat story. Tearjerker, though.