Sean Penn and Charlize Theron have been dating for just over a year, but could they be taking steps to become family? According to reports Sean has filed papers to adopt Charlize's three-year-old son Jackson, in the ultimate sign of commitment to his rumoured fiancée.
"Charlize and Sean are very serious," a source told People. "Charlize says this is it. Jackson already calls Sean daddy. This is the first step towards them getting married."