Thoughts on casting Wormtail?

[aaoconnor2002]

I have enjoyed reading all the posts regarding possible actors for 
the parts of Remus Lupin and Sirius Black.  Does anyone have any 
thoughts on who should play Wormtail?  For some reason I can't get 
Rowan Atkinson out of my mind.  I know he doesn't fit the physical 
description of the character at all but I can picture him groveling 
on the ground and saying, "Wasn't I a good rat?". 8-)

Audrey