Taylor Lautner finds his place in the final chapter of the Twilight Saga. Breaking Dawn Part 1 finds Bella and Edward getting married and Lautner's Jacob imprinting on their child.
Jacob Black doesn't play a huge role in Twilight, but his character is prominent in both New Moon, Eclipse, and Breaking Dawn. He's 15 years old in the original story and lives with his father. Jacob is actually the guy who reveals to Bella just what/who Edward is.