An interior rearview mirror assembly for a vehicle includes a reflective element, a housing or casing supporting the reflective element, and the casing including a storage space. The storage space provides storage for at least one accessory and for storing the accessory in the location easily accessible by an occupant of the vehicle whereby the accessory can be inserted into and removed from the storage space for use by an occupant of the vehicle. The storage space may take the form of a recess provided in a top wall of the casing, a recessed portion provided in a front wall, back wall, or end wall of the casing. In one form, the recessed portion houses a pendent accessory which is movable between a retracted position within the recess to an extended position for viewing by an occupant of the vehicle. For example, the pendent accessory may include a reflective element or a display element, for displaying information to an occupant of the vehicle.