Who are your favourite "oh, that person!" in movies?

You know, those people who show up in movies and you know you've seen them someplace.

Beth Grant
https://en.m.wikipedia.org/wiki/Beth_Grant

Brent Briscoe (RIP)
https://en.m.wikipedia.org/wiki/Brent_Briscoe

Estelle Harris
https://en.m.wikipedia.org/wiki/Estelle_Harris

Blake Clark
https://en.m.wikipedia.org/wiki/Blake_Clark

William Fichtner
https://en.m.wikipedia.org/wiki/William_Fichtner

Lin Shaye
https://en.m.wikipedia.org/wiki/Lin_Shaye

Bruce McGill
https://en.m.wikipedia.org/wiki/Bruce_McGill

Kurt Fuller
https://en.m.wikipedia.org/wiki/Kurt_Fuller

Margo Martindale
https://en.m.wikipedia.org/wiki/Margo_Martindale