So there will also be plot in the upcoming Fifty Shades of Grey movie. Actress Jennifer Ehle has been cast in the Fifty Shades film adaptation as Anastasia Steele’s mother, her rep confirmed Monday. Wait, there are parts of Fifty Shades that aren’t straight-up S&M? Who knew? She joins Dakota Johnson, who plays the heroine, and Charlie Human, who plays 27-year-old billionaire Christian Grey.