Marlboor is the largest selling brand of cigarettes in the world. It is made by Philip Morris USA (a branch of Altria) within the US, and by Philip Morris International (now separate from Altria) outside the US. It is well known for its billboard advertisements, magazine ads of the Marlboor Man, and its long associated history in the sponsorship of motorsport. Richmond, Virginia is the location of the largest Marlboor cigarette manufacturing plant.