By worldwide box office gross (adjusted for inflation):
* Gone with the Wind (1939): This classic film holds the title when adjusted for inflation. It would have grossed over $3.9 billion in today's dollars.
By worldwide box office gross (unadjusted):
* Avatar (2009): This science fiction epic currently holds the record with over $2.92 billion in unadjusted box office gross.
By global ticket sales (adjusted for inflation):
* Star Wars: A New Hope (1977): This film would have sold over 2.7 billion tickets worldwide when adjusted for inflation.
By global ticket sales (unadjusted):
* Avatar (2009): Again, Avatar takes the lead with an estimated 2 billion tickets sold.
Therefore, depending on the specific metric you choose, the highest selling movie of all time could be either Gone with the Wind or Avatar.