I'm told that Marvel has also made an approach to Channing Tatum. [EDIT] It'll come down to Marvel making an offer, and Tatum either accepting it or rejecting it. But he is definitely in the mix, along with other confirmed candidates that include Fantastic Four's Chris Evans, Cloverfield's Mike Vogel and Tron Legacy's Garrett Hedlund, and Generation Kill's Wilson Bethel. Reports have Ryan Phillippe also vying for the job....says Mike Fleming HERE. The same report touches on CA's search for its female star:
While Marvel is looking for an American actor to play Captain America, the candidates for the female lead are British. So far, Keira Knightley, Alice Eve and Emily Blunt are under consideration.