- Was second choice to play Mike TeeVee's mom, in Willy Wonka & the Chocolate Factory (1971). The producer's first choice was Jean Stapleton, who declined, for a TV pilot, instead. The pilot was All in the Family (1971).
- Her sons Dix Denney and John Denney are the founders of the Los Angeles based punk band The Weirdos.
- Prior to her death, Ms Denney retired from acting, and lived in the KansasCity area (according to the actors' commentary on Willy Wonka & the Chocolate Factory (1971).'s DVD).
- Started her career on local Missouri TV playing Marilyn the Witch on "The Witching Hour."
- In 2021, Dolores Denny - "Marilyn The Witch" - "The Witching Hour", was inducted into "The Official Horror Host Hall of Fame".
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