Number 3 is J.K. Rowling. I think that's a PC with CrunchBang on her lap. You can tell because she looks "contented".
Nr. 1 is Dave Gahan from Depeche Mode.
no 2 looks a bit like lennard pottering...
It isn't him but you can find out for sure my grabbing the image URL.
Then plug the URL into a reverse photo search as explained in the link below:
============= You are the dreamer - and the dream =============
gooplusplus.com (goo++) --- compact web tools and 250+ internet radio stations
i did look at that link - but lost interest after it didn't work/didn't totally understand it.
actually i just standard googled the last part of the URL and scott heifferman came up.