A continuous-forms printing system including a printer that is configured to print on a web of print media, said printing system comprising: a printhead alignment system for the continuous-forms printing system comprising an upstream printhead and a downstream printhead, the printhead alignment system comprising: a first sensor, a second sensor and a controller, wherein the first sensor is configured to detect lateral positions of the upstream printhead relative to sections of the web of print media traveling through the printing system, wherein the first sensor is arranged proximate to the upstream printhead; the second sensor is configured to detect lateral positions of the downstream printhead relative to the sections of the web of print media, wherein the second sensor is arranged proximate to the downstream printhead, wherein the downstream printhead is placed after the upstream printhead in the direction of travel of the web of print media; and the controller is configured to align the downstream printhead with the sections of the web of print media based on the lateral positions of the upstream printhead and the lateral positions of the downstream printhead, and wherein the controller is configured to detect the lateral positions of the upstream printhead by continuously measuring with the first sensor a position of a physical edge of the web of print media proximate to the upstream printhead and to detect the lateral positions of the downstream printhead by continuously measuring with the second sensor a position of a physical edge of the web of print media proximate to the downstream printhead; characterized in that the controller is configured to determine an amount of adjustment to move the downstream printhead laterally across the web from its current lateral position to align the downstream printhead with the section of the web, and to instruct a positioning device to adjust the lateral position of the downstream printhead by the time that the section of the web has reached the downstream printhead. a first sensor, a second sensor and a controller, wherein the first sensor is configured to detect lateral positions of the upstream printhead relative to sections of the web of print media traveling through the printing system, wherein the first sensor is arranged proximate to the upstream printhead; the second sensor is configured to detect lateral positions of the downstream printhead relative to the sections of the web of print media, wherein the second sensor is arranged proximate to the downstream printhead, wherein the downstream printhead is placed after the upstream printhead in the direction of travel of the web of print media; and the controller is configured to align the downstream printhead with the sections of the web of print media based on the lateral positions of the upstream printhead and the lateral positions of the downstream printhead, and the first sensor is configured to detect lateral positions of the upstream printhead relative to sections of the web of print media traveling through the printing system, wherein the first sensor is arranged proximate to the upstream printhead; the second sensor is configured to detect lateral positions of the downstream printhead relative to the sections of the web of print media, wherein the second sensor is arranged proximate to the downstream printhead, wherein the downstream printhead is placed after the upstream printhead in the direction of travel of the web of print media; and the controller is configured to align the downstream printhead with the sections of the web of print media based on the lateral positions of the upstream printhead and the lateral positions of the downstream printhead, and