Three Highest-Grossing Movies of All Time: 'Endgame,' 'Avatar,' and 'Titanic' Dominate Cinematic History"Explore the cinematic juggernauts that have shattered box office records and captivated audiences worldwide. From the superhero epic "Avengers: Endgame" to James Cameron's visually stunning masterpieces "Avatar" and "Titanic," these top-grossing films have left an indelible mark on the history of cinema.