Snow Cake, with Sigourney Weaver, Alan Rickman, Carrie Ann Moss and many others.
It's the story of Alan Rickman as Alex, who picks up a young female hitchhiker and is in an accident, after being hit by a truck, the female hitchhiker does not make it. As he recovers in the nearby hospital he discovers that the young female has a mother and grandparents who raised her. Her mother has autism, lives alone, and had been looked after by her daughter to a certain extent. What I liked about the film is Weaver as an autistic woman, the first portrayal I've ever seen in a film that appealed to me.
She did things that were familiar to me, like dancing to her favourite music and visualizing it, not liking strangers in her home, being somewhat obsessive about cleanliness and when precisely to put the garbage out. Yes, these are co-morbid habits but go a long way toward being indicators of autism.
I'm more high-functioning than the character she portrays, but so many of the behaviours she manifested were close to the way I am in the world.
Think Sigourney Weaver acted an excellent portrayal of an autistic woman.
What I disliked afterwards was reading the rotten tomato reviews, where many reviewers wrote that it was a poor representation of autism in females. As a female with autism it was an excellent representation of someone on a spectrum.