
Acting
Denise Nickerson (April 1, 1957-July 10, 2019) was an American former actress best known for her roles as the gum-chewing Violet Beauregarde in the 1971 movie Willy Wonka & the Chocolate Factory as well as Amy Jennings and Nora Collins in the soap opera Dark Shadows.
Description above from the Wikipedia article Denise Nickerson, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Howard
as Shirley (archive footage)

Celluloid Bloodbath
as Self

Dark Shadows: The Haunting of Collinwood
as Amy Jennings (archive footage)

Pure Imagination: The Story of 'Willy Wonka & the Chocolate Factory'
as Self

Zero to Sixty
as 'Larry' Wilde

Child of Glass
as Connie Sue Armsworth

The Koozebanian
as Kana Nelson

The Dark Side of Innocence
as Gabriela Hancock

Smile
as Shirley

The Man Who Could Talk to Kids
as Dena Pingitore