Natalie Portman Cast in THOR? But Who will Play Thor?

'Thor' is one of those films I am really looking forward to. I have high hopes for this one, and with Kenneth Branagh directing I am pretty sure this is going to be a great film.  Marvel is currently in the process of casting the film and it seems like there are a handful of actors out there that have a shot at playing the lead character Thor. Before I go through these names rumor has it via deadlinehollywood that Natalie Portman is in the lead to play the main female role in the film which would be great! Who doesn't like Natalie Portman!? They don't say who she will play, but I just assume it will be Sif.

As for who will take on the role of Thor there are four low key actors that are currently in the running:

Charlie Hunnam who is the British co-star of the F/X series 'Sons Of Anarchy'.I could see him in the role of Thor.

Tom Hiddleston who is a award-winning British actor who played Winston Churchill's son in HBO's The Gathering Storm. I don't see it at all. He does not have the build or the look.

Alexandar Skarsgard who was in the HBO Iraq War miniseries Generation Kill and vampire drama True Blood. He is the best choice out of the bunch.

Joel Kinnaman who hasn't really done much, and who in no way shape or form should even be considered for the role, but maybe hes a good actor.

I am pretty sure out of the choice we are given Alexandar Skarsgard is the guy most likely to get the part. What are you thoughts on Natalie Portman posibly being cast and the options that we are given for the role of Thor?