Smaug is the main dragon antagonist in J.R.R. Tolkien’s The Hobbit.
Smaug occupies the Lonely Mountain and has taken the treasure of the Dwarven kingdom beneath it. Bilbo Baggins enters the mountain as part of Thorin Oakenshield’s quest and speaks with the dragon before discovering a vulnerable bare patch in Smaug’s otherwise armoured underside.
Smaug’s attack on Lake-town leads to his death by Bard the Bowman, who uses the Black Arrow. The dragon’s destruction opens the way for the conflict known as the Battle of the Five Armies, which concludes the novel’s central adventure.
Tolkien created several dragons across his legendarium, so names such as Glaurung and Ancalagon can cause confusion. Glaurung belongs to the First Age stories, while Ancalagon appears in the history of the War of Wrath. Smaug is specifically the dragon of The Hobbit.