Edgar Wright releases a Marvel with a behind the scene teaser picture of Ant-Man from the movie set

Ant-Man Marvel Movie Set PreviewFrom the camera and Twitter feed of Ant-Man movie Director Edgar Wright is a teaser image of Hank Pym as Ant-Man, the question is who is the actor? The only thing I’ve been able to find it is the interwebs are pretty certain it isn’t Simon Pegg, what are your thoughts?