Abstract: Movable spoiler assembly for a road vehicle comprising: a movable spoiler configured to be movably attached to a body of the road vehicle and capable of being moved between a retracted position and an extracted position; and an actuation system configured to control the movable spoiler between the retracted position and the extracted position; the actuation system comprises at least two actuators to move the movable spoiler and at least two transmission elements to operatively couple each actuator to the movable spoiler; the two actuators comprise a first actuator configured to command at least the displacement of the movable spoiler between the retracted position and the extracted position, and a second actuator configured to command at least a tilt of the movable spoiler around the longitudinal axis, so as to vary an angle of incidence of the leading edge of the spoiler.