Doesn't James Purefoy look like John Castle?

I was re-watching the I, Claudius series which I bought recently since I wanted the 35th anniversary and even though I had seen it before, I never owned it.

Anyways, when I saw John Castle(Postumus) I noticed a strong resemblance between him and James Purefoy(who played Marcus Antonius in HBO's Rome).

This is a picture of Postumus:

http://www.angelfire.com/realm/mine2/JC/postumus.gif

Marcus Antonius:

http://mikophoto.net/wordpress/wp-content/uploads/2011/02/Marcus-Antonius-or-Mark-Antony-as-portrayed-by-James-Purefoy-in-the-2005-2007-HBO-miniseries-ROME.jpg

I'm not sure if my eyes deceive me but they really do look alike, I guess we have an actor set for the role of Postumus in the new I, Claudius show coming in haha