Oh gods, am even I mad enough to actually do that? It would be hysterical! I'm not sure I could get through it straight-faced. It's got my wheels turning, though. I could get my bro and his film crew friends to record me standing in front of the TV (blocking Tate, of course) and "playing" the scene opposite a very obviously recorded, TV-sized Tennant. Hahahahahahahahahaha! OMG, The thought is making me laugh so hard, I might actually have to do it.
Cripes, now I'm seeing it as a sketch from a comedy show. Nobody actor is in a casting director's office claiming to have worked with all sorts of big names. The casting director is naturally skeptical, so the actor whips out their demo reel, and it's full of scenes opposite the TV, as described above.
Naturally, I'd have to be in full costume to really sell it.
Hmmm...might have to buy Much Ado DVD.