Known for her recurring character of Janet Heffernan on the CBS series The King of Queens, this actress also appeared in the 2009 film Extract with Jason Bateman, Ben Affleck, and Mila Kunis and in the 2010 horror feature Devil.
After briefly studying at Carnegie-Mellon University (then called Carnegie Tech), she trained in New York with famous acting teachers Sanford Meisner and Lee Strasberg.
In 1986, she married English-born television actor Nick Ullett; they later became parents to two children.
She and her actress sister, Jill O'Hara, both performed in the Broadway production of Promises, Promises. The girls' mother, Edith Hopkins O'Hara, established New York's 13th Street Repertory Company.
She and Dorothy Loudon were both in the cast of the 1969 Broadway production of The Fig Leaves Are Falling.