She was on the show its entire four-year run, in a group that included Annette Funicello (she later appeared on Funicello’s spinoff series Annette). The gig led to a role in Disney’s 1956 film Westward Ho the Wagons! that starred a pre-Daniel Boone Fess Parker. In the 1960s she had several TV guest-starring roles and also toured American military bases in South Vietnam and Thailand with her own act.

Cubby O’Brien and Doreen Tracey, Aug 16, 2015. Anaheim, Calif (TIME)

Later, Tracey became a publicist to Zappa and had a long career in administration at Warner Bros. But she remained close to her Disney roots, appearing at conventions and performing in reunion shows including the series’ 60th-anniversary celebration in 2015.

Doreen, Tommy, Sharon, Dusty, Sherry, and Bobby (MiceChat)

“Our Dodo, as we lovingly nicknamed her, always had a smile on her face,” fellow Mouseketeer Tommy Cole said. “She never failed to make us all feel good, and we will miss her.”

Tracey is survived by her son, Bradley; and grandchildren Gavin and Autumn.