A vehicle rearview mirror system includes a variable reflectance reflective element, an ambient light sensor that is operable to sense ambient light, and a glare light sensor that is operable to sense glare light. A control circuit is responsive to light detection by at least one of the ambient and glare light sensors and establishes a reflectance level of the reflective element. A video display screen is disposed behind the reflective element operable to display video information through the reflective element and viewable through the mirror reflector of the reflective element by a driver of the vehicle when the video display screen is activated, and substantially non-viewable by the driver of the vehicle when the video display screen is not activated.