The actress was an original All My Children cast member - she played Ruth Brent Martin and became the only star ever to win an Emmy Award for her work on a soap opera.
Also a regular on Broadway, Fickett appeared in plays like Love & Kisses and Tea & Sympathy.
She was nominated for a Tony Award in 1958 for her portrayal of Eleanor Roosevelt in Sunrise at Campobello.
Producers of All My Children are planning to dedicate the 21 September (11) episode to Fickett.
The long-running series will air its final episode two days later.