Superman- Armie Hammer, I know he was supposed to be Batman in the Justice League film a couple years back, but I think he has the look of Superman. He's 24 years old (which means he could do many more films as Superman) and he's 6 foot 5 in my opinion the perfect height for Superman. He has the voice for Superman and i hear he is a good enough actor.
Lois Lane- Erica Durance, I know people don't want anybody from Smallville being in the reboot but in my opinion she is the best actress to play Lois Lane.
Jimmy Olsen- Anton Yelchin, is the perfect choice for Jimmy Olsen, he has the acting chops to be on the screen with anyone. He is 21 years old and he 5 foot 9.
Perry White- Jeremy Piven, watching Jeremy on Entourage, I can definitely see him playing Perry White. He is a great actor, I have no doubt in my mind that he would be great. He is only 45 years old which would give him many opportunties to keep playing him in the future.
Jonathan Kent- Jon Voight, a great actor that could pull off Jonathan Kent. He is pretty old but he will most likely die in the movie anyways.
Martha Kent- Helen Mirren, great actress, who can play any role she is given, and you all know how much Chris Nolan loves his British actors.