The 10 highest-grossing movies of all time

Adjusted gross: $922,397,100

Unadjusted gross: $232,906,145

The 1970s horror film about a young girl possessed is widely regarded as the best in the genre. And at the time it came out, William Friedkin's masterpiece was by far the most terrifying thing around.

Adjusted gross: $1,035,289,700

Unadjusted gross: $111,721,910

The David Lean-directed epic starring British icons Alec Guinness and Julie Christie tells the story of a romance set against the backdrop of World War I.

Adjusted gross: $1,068,177,300

Unadjusted gross: $260,000,000

Steven Spielberg created the summer blockbuster with his thriller starring Richard Dreyfuss about the great white shark lurking just beneath.

Adjusted gross: $1,092,540,000

Unadjusted gross: $65,500,000

The biblical epic has Charlton Heston in his most famous role as Moses.

Adjusted gross: $1,129,857,100

Unadjusted gross: $658,672,302

"Titanic" was director James Cameron's first world-conquering smash, before "Avatar," and it launched the careers of Leonardo DiCaprio and Kate Winslet.

Adjusted gross: $1,183,065,200

Unadjusted gross: $435,110,554

Spielberg's other biggest movie of all time, "E.T.," tells a coming-of-age story about a boy who happens to befriend an alien that's just landed in his neighborhood.

Adjusted gross: $1,187,744,200

Unadjusted gross: $158,671,368

By far the most well-known and beloved musical film of all time, starring Julie Andrews and Christopher Plummer.

Adjusted gross: $1,485,517,400

Unadjusted gross: $460,998,007

Spielberg may have given rise to the modern blockbuster as we know it now, but George Lucas gave us the biggest blockbuster, and the most successful cinematic sci-fi series ever, which now continues under Disney with "Star Wars: The Force Awakens." And Harrison Ford, Mark Hamill, and Carrie Fisher are back again.

Adjusted gross: $1,685,052,200

Unadjusted gross: $198,676,459

It's hard to imagine the effect this epic film set against the Civil War and Reconstruction had on American moviegoing audiences when it came out, breaking all records at the time and earning the highest-ever domestic gross in today's dollars.

But it's safe to say that the story of Scarlett O'Hara, adapted from the award-winning novel and starring Clark Gable and Vivien Leigh, is deeply embedded in the American consciousness.

If you weren't to adjust grosses for inflation at all, these have been the top-performing movies at the domestic box office over their lifetime. You can see the top 10 for worldwide grosses here:

1. "Avatar": $2.788 billion

2. "Titanic": $2.186 billion

3. "Star Wars: The Force Awakens": $2.068 billion

4. "Jurassic World": $1.670 billion

5. "Marvel's The Avengers": $1.519 billion

6. "Furious 7": $1.516 billion

7. "Avengers: Age of Ultron": $1.405 billion

8. "Harry Potter and the Deathly Hallows Part 2": $1.341 billion

9. "Frozen": $1.276 billion

10. "Iron Man 3": $1.215 billion

You can also see the most successful movies in the US by number of tickets sold here.