
Acting
Mildred Dunnock (January 25, 1901 – July 5, 1991) was an American theater, film and television actress.
Description above from the Wikipedia article Mildred Dunnock, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Elvis: A Life in Music
as Self (archive footage)

The Pick-up Artist
as Nellie

The Children's Story
as The Old Teacher

The Patricia Neal Story
as Self

The Big Stuffed Dog
as Petey's Grandmother

Isabel's Choice
as Helen

Baby Comes Home
as Serena Fox

The Best Place to Be
as Rose Price

Arthur Miller on Home Ground

And Baby Makes Six
as Serena Fox

Ghost Story
as Mrs. Rule · 1 ep.

The Dick Cavett Show
as Self - Guest · 1 ep.

The F.B.I.
as Sarah Whitaker · 1 ep.

The Alfred Hitchcock Hour
as Minnie Briggs · 1 ep.

The Defenders
as Irene Brennan · 1 ep.

The Investigators
as Grandmother · 1 ep.

Thriller
as Miriam Olcott · 1 ep.
The Tom Ewell Show
1 ep.

Armchair Theatre
as Mrs. Mavis · 1 ep.

Alfred Hitchcock Presents
as Martha Collins · 1 ep.