Gollum is an important character in "The Hobbit" and "The Lord of the Rings". Originally he was a hobbit named Sméagol, who found the One Ring after Isildur lost it. Gollum went to live under the Misty Mountains; there he kept the Ring for over 500 years, and in that time the Ring changed him to look less like a hobbit. He often called the Ring his "precious". Gollum lost the One Ring, which was then found by Bilbo Baggins in "The Hobbit". 