Sarah Palin's daughter, Bristol, gave birth to a boy on Saturday, People magazine reports.
Bristol, 18, gave birth to Tripp Easton Mitchell Johnston who weighed 7 pounds, 7 ounces, the magazine reports.
Baby Tripp takes his surname from his dad, Levi Johnston, an apprentice electrician and former Wasilla High School hockey player who has been dating Bristol for three years.
Bristol Palin is currently residing in Wasilla and completing her high-school diploma through correspondence courses.
Johnston is studying to become an electrician. He told the Associated Press in October that he and fiancée Bristol plan to wed in 2009 and raise the child together.
Bristol's pregnancy became national news after liberal bloggers floated rumors that Sarah Palin faked her pregnancy. Several conservatives quickly came to Palin's defense for encouraging her daughter to carry the baby to term.