Denise Nickerson (born April 1, 1957 - died 10 July 2019) was an American former child actress, best known for her roles as the gum-chewing Violet Beauregarde in the 1971 movie Willy Wonka & the Chocolate Factory, Allison on The Electric Company and Amy Jennings and Nora Collins in the soap opera Dark Shadows.
Nickerson has been married twice. Her first marriage was to Rick Keller in 1981; he died two years later of a brain aneurysm. Her second marriage was to Mark Willard in 1995; they had one son, Josh, before divorcing in 1998.
In June 2018, Nickerson suffered a severe stroke and was hospitalized in an intensive care unit. Nickerson was discharged to a rehabilitation center in July. In August, Nickerson returned home to recover under her family's care.
In July 2019, she was taken off life support and passed away on 10 July, 2019, only a few hours later.