The proud mom posted on Twitter on Monday, "My beautiful child Dakota has been chosen to play Anna Steele in 50 Shades. Look out world! Here she comes!!! #proudmama."
Author E.L. James announced the casting, revealing Charlie Hunnam would be playing Christian Grey opposite Johnson's Anastasia Steele. The film centers on a young college woman who gets involved in a bondage relationship with a wealthy man.
Producer Michael De Luca explained that there was "incredible chemistry" between the pair of actors. He said, "Auditions were stunning."