There is provided an image display apparatus that receives a broadcast program and displays video images relating to the broadcast program. The image display apparatus comprises, among other things, a communication interface for communicating with a rendering apparatus that is externally connected; an input unit that receives image data for displaying graphic images from the rendering apparatus, the graphic images being different from the video images relating to the broadcast program; and a control unit that gives an instruction to the rendering apparatus, via the communication interface, to generate the image data, and obtains, via the input unit, image data generated by the rendering apparatus according to the instruction.