Jacob Black (also known as "Jake") is a fictional character in the Twilight series by Stephenie Meyer. He is described as a Native American of the Quileute tribe in La Push, near Forks, Washington. In the second book of the series, he undergoes a transformation that allows him to morph into a wolf. For the majority of the series, Jacob competes with Edward Cullen for Bella Swan's love. In the films Twilight, New Moon, and Eclipse, Jacob is played by Taylor Lautner. (Source: wikipedia)
