Abstract: An adjustable wheel-well skirt system for fitting within wheel-well openings of a vehicle and covering the wheel-well openings and wheel-well cavities which are defined by the wheel-well openings. The wheel-well skirt system comprises a number of adjustable wheel-well skirts corresponding in number to the number of wheel-well openings of the vehicle. Each adjustable wheel-well skirt is sized and shaped substantially similar to the size and shape of the respective wheel-well opening it will engage. When secured to the vehicle, each adjustable wheel-well skirt fills the wheel-well opening, giving the vehicle a smooth, continuous appearance. A track extends from each adjustable wheel-well skirt and slideably engages a bracket which is mounted to the vehicle behind the wheel-well opening.