Spoiler; JKR cameo in CoS?

[GulPlum]

--- In HPFGU-Movie at y..., TACtalk at a... wrote:
Not
really
much
spoiler
stuff
here,
but
just
in
case...
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> I too read a couple of times that CC said that JKR *never* visited 
the CoS set.
> 
> Didn't notice the woman on the station platform; if it was JKR, 
that could
> get around that one...King's Cross is a location, not a set.

I paid attention to that scene at the cinema today - the woman at 
King's Cross is *NOT* JKR. The only thing they have in common is 
blonde hair.