The actress passed away on Tuesday (22Mar11) at her apartment in New York.
Born in Minnesota in 1925, Stenborg became known for her numerous stints onstage. She won acclaim in touring show Da in the 1970s, which also featured her late husband, Barnard Hughes, and she landed a Tony nomination in 1999 for her performance in Noel Coward play Waiting in the Wings. She also starred in Hugh Leonard's A Life in 1980 and teamed up with Helen Mirren in A Month in the Country (1995).
Stenborg and Hughes were both presented with Lifetime Achievement honours at the Drama Desk Awards in 2000.
She also appeared in a variety of small film and TV roles, including U.S. series Little House on the Prairie and soap opera One Life to Live.
Her last Broadway stint came in The Crucible in 2002, when she took the stage with Liam Neeson and Laura Linney.
She also played Sister Teresa in 2008's Doubt - her final film role.
Stenborg is survived by a son and daughter. Hughes died in 2006.