Is close friends with Riley Keough. She served as a bridesmaid in Keough's wedding on February 4, 2015.
Has collaborated with Nicholas Braun twice; they appeared together in Date and Switch (2014) and again in the short film, In a Relationship (2015). Both times they played a struggling young couple.
Ended her relationship with Welsh model, Matthew Hitt, in February 2015 after three months. The couple reconciled in April 2015.
Was a presenter at the 87th annual Academy Awards on February 22, 2015. Johnson attended the ceremony with her mother, Melanie Griffith.
Her favorite book is the 1955 novel, Lolita, by Vladimir Nabokov.