Christopher Nolan’s Oppenheimer has reached yet another milestone in the seven weeks since its release – now bringing in over $850million (£671million) from global ticket sales.The dark drama – which saw Cillian Murphy take on the role of J. Robert Oppenheimer, ‘father of the atomic bomb’ – arrived in cinemas on July 21, and has since gone on to become one of Christopher Nolan’s most successful films to date.In the seven weeks since its debut, the movie has generated millions globally and continues to surpass expectations – particularly with its genre as an R-rated biographical, historical drama.Now, it has been confirmed that Oppenheimer has hit yet another impressive milestone, and has crossed $850milion in ticket sales globally.According to reports by Variety, around $311million (£241million) of this figure has come from sales across North America, while around $542.7million (£334million) has come in internationally.