50 Shades of Grey movie - Who is Dakota Johnson's butt double? The actress has admitted she had a butt double for the movie as she didn't feel like getting spanked with a belt. The 25-year-old actress plays Anastasia Steele opposite Jamie Dornan as Christian Grey in the highly-anticipated raunchy drama and though she admits most of the nudity in the film is all … [Read more...] about 50 Shades of Grey movie – Who is Dakota Johnson’s butt double?