I'm trying to figure out who they would be, and other than Joseph Fiennes as a younger Voldemort, I'm drawing a blank. Watts is waaay too young for Narcissa, and Townsend is too young for Scrimgeour.

Entertainment Weekly had some guesses at casting HBP when it was released, and I liked their suggestions of Brian Cox for Scrimgeour and Bob Hoskins for Slughorn.

Watts is waaay too young for Narcissa,

Huh? She's like my age (38). Look at her hands!

ETA: she's almost exactly my age. She turns 39 in Sept. the month after I do

Brian Cox for Scrimgeour

That must have stuck in my head subconsciously because he was exactly who I was seeing when I was just re-reading 6.

She's like my age (38).

Seriously?!? I'm picturing her as 25-30, tops. Which would probably make her and her agent happy.

Watts is waaay too young for Narcissa

This, because I NEVER would have guessed she was 38. Happy agent, indeed!

Brian Cox would be excellent for Scrimgeour.

Hm, I don't remember enough about Scrimgeour.

Joseph Fiennes as Tom Riddle would be kind of hilarious. They already had an actor for Hogwarts-era Tom in COS, though.

I bet Townsend will be Tom Riddle Sr., and maybe Fiennes will be one of the Gaunt family?

Someone has to be Slughorn, too.

Danny DeVito.

This, because I NEVER would have guessed she was 38. Happy agent, indeed!

Seriously, look at her hands some time. They definitely age her up.

One hand.
Two hands.
No hands.

Yeah, she's aged very very well, but she's breathing down the neck of 40. The first time I saw Tank Girl, I just assumed that either it was some other Naomi Watts or she was just a wee little oddly-mature teen actor at the time, because how could the same person have been in King Kong and Mulholland Falls and an old, old, long-ago thing like TG. And yet, there she was and is.

After Mulholland Falls, I'm willing to believe she can do just about anything, and that Narcissa's jangly brittle misery will be a snap for her.