
Acting
Kay Thompson (November 9, 1909 — July 2, 1998) was an American author, composer, musician, actress and singer. She is best known as the creator of the Eloise children's books.
Description above from the Wikipedia article Kay Thompson, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Liza: A Truly Terrific Absolutely True Story
as Self (archive footage) (uncredited)

It's Me, Hilary: The Man Who Drew Eloise
as Self (archive footage)

Kay Thompson: Think Pink!
as Self (archive footage)

Liza with a Z
as Self - Audience Member (uncredited)

Tell Me That You Love Me, Junie Moon
as Miss Gregory

Who Killed Julie Greer?
as Mrs. Pierce

Funny Face
as Maggie Prescott

Eloise
as Herself

Heritage of Anger
as Self - Announcing Next Week's Show

The Kid from Brooklyn
as Matron