The star, whose career spanned more than five decades, passed away on 15 May in St. George, Utah, according to Variety.
No more details about her death were available as WENN went to press.
Stuart began working on the small screen in the 1950s with a role in I Led Three Lives and went on to star in shows such as Gomer Pyle, U.S.M.C., The Queen and I, and Pete and Gladys.
In later years she appeared in Nash Bridges and Huff with Blythe Danner, while her movie roles included parts in Airplane! and Bachelor Party.