| Year | Title | Role | Notes |
| 1979 | A Month in the Country | Vera | - |
| 1979 | Artichoke | Lily-Agnes | - |
| 1981 | A Taste of Honey | Josephine | Nominated—Tony Award for Best Actress in a Play Nominated—Drama Desk Award for Outstanding Actress in a Play |
| 1982 | Agnes of God | Agnes | Tony Award for Best Featured Actress in a Play Drama Desk Award for Outstanding Featured Actress in a Play |
| 1983 | The Glass Menagerie | Laura | - |
| 1985 | A Lie of the Mind | Beth | - |
| 1986 | You Never Can Tell | Dolly Clandon | - |
| 1987 | Pygmalion | Eliza Doolittle | Nominated—Tony Award for Best Actress in a Play |
| 1990 | Abundance | Bess | - |
| 1998 | Killer Joe | Sharla | - |
| 2005 | The Lark | Joan of Arc | - |
| 2006–2007 | Summer and Smoke | Alma Winemiller | - |
| 2013 | The Two-Character Play | Clare | - |
| 2017 | The Night Of The Iguana | Hannah Jelkes | - |