Your favorite actor/actress in HP movies

[Carol]

Carol earlier:
> <snip>
> Who (which British actor) could capture that coldness, not only in
personality but in voice, and produce a high-pitched, scary, laugh
that curdles the blood without sounding like Helena Bonham Carter's
Bellatrix Lestrange or Margaret Hamilton in "The Wizard of Oz"?
> 
> Thoughts, anyone?

Missy Gallant responded: 
> He's too old- but I think Anthony Hopkins could pull it off.  He can
certainly do cold voice.

Carol again:

Brr. shiver! Voldemort eating someone's liver with a nice Chianti!
You're right that Anthony Hopkins could do it, and he'd be scarier,
IMO, than Ralph Fiennes. As for his being too old, Voldemort is about
seventy. Admittedly, he seems to be ageless given the snakelike
features and the restoration (magical cloning?) of the same body he
had thirteen years before. The Horcruxes don't seem to prevent normal
aging, though, since the Tom who kills Hepzibah looks older than the
Tom of Slughorn's memory. (It's harder to tell with the Voldemort of
the DADA interview, whose features are blurred, but he seems, despite
that, to be clearly a man in his thirties rather than a boy of twenty.)

Anyway, Anthony Hopkins would have been an interesting choice. Maybe
they'll cast him as Grindelwald (unless they choose a German actor
instead).

Carol, now trying to disassociate Voldemort from Hannibal Lecter!