Now, I don't want any major celebrities beating a path to Glasgow to pull me up for using their image, so you're stuck with a photo of my wee boy. Sorry!
You will need:
Photograph editing software or an online photo editing tool
A photo of your choice
Edit your photograph so that it is black and white, and then use the exposure, brightness and contrast tools to emphasise the shadows and highlights. It will look grainy and odd, but this will help add to the effect. I use a photo editing software, but there are free online tools available.
If you can, erase as much of the background from your photograph as possible.