1987, she joined the cast of NBC's Valerie's Family (previously known as Valerie, later to be retitled The Hogan Family) after Valerie Harper was dismissed. Duncan starred as the matriarch's sister-in-law Sandy Hogan, who moves in with her brother Mike (Josh Taylor) and his three sons to help raise the family after Valerie Hogan's death. Duncan remained with the series through its cancellation in 1991. In 1988, she worked on the first three Barney and the Backyard Gang children's videos. Duncan was asked to take part in the Barney & Friends television series, but declined the offer. In 1991, she voiced Peepers the mouse in the Don Bluth film Rock-a-Doodle. In 1994, she voiced Queen Uberta in the Richard Rich film The Swan Princess. In 2003, Duncan appeared in the rotating cast of the Off-Broadway staged reading of Wit & Wisdom. In May 2008, she performed one of the lead roles in the musical No, No, Nanette, a production of the City Center's annual Encores! series. In April 2009, she performed the lead role in the play Driving Miss Daisy at Casa Mañana Theatre in Fort Worth, Texas. In September 2009, she played the lead role in Tennessee Williams' play The Glass Menagerie at the Mountain Playhouse in Jennerstown, Pennsylvania. She has also participated in many traveling stage productions, including The King and I. On February 12, 2016, Duncan took the role of Madame du Maurier in the Broadway production of Finding Neverland. On February 17, the show's producers announced that she would take a temporary leave of absence because of family obligations. Personal life Duncan met singer-actor Bruce Scott (born Bruce Scott Zaharaides) during the Off-Broadway production of Your Own Thing, and they were married in September 1968. Their divorce, finalized in October 1972, was caused by tensions resulting from Duncan's success and rise to stardom. Duncan told People magazine in 1979 that "It was very threatening to Bruce." Her second marriage was to Dr. Thomas Calcaterra on January 10, 1973; it lasted until 1979. Duncan met Calcaterra when he was a consulting surgeon for her brain-tumor surgery. This marriage also failed, according to Duncan, because of the demands of her 1978 nightclub act and her refusal to remain at home to be a good "doctor's wife." Since July 21, 1980, Duncan has been married to actor choreographer Don Correia. They have two sons, born in 1982 and 1984.