Wilson, who was scheduled to play Madame Armfeldt opposite her Grey Gardens co-star Christine Ebersole (as Desiree Armfeldt), has withdrawn "due to a scheduling conflict," according to a press statement.

Steinbach was most recently seen as Lady Bracknell in the Lyric Stage production of The Importance of Being Earnest.

The three concerts at Boston's Symphony Hall will also feature Ron Raines and the Boston Pops orchestra conducted by Keith Lockhart. The 8 PM concerts will also boast the Tanglewood Music Center Fellows. (Tanglewood will present this cast in Night Music July 8 at 8:30 PM.)

Joining Ebersole, Raines and Steinbach onstage will be Katie Henney as Fredrika Armfeldt and Tanglewood Music Center fellows Ashley Logan as Ann Egerman, Zachary Wilder as Henrik Egerman, Matthew Worth as Count Carl-Magnus Malcolm, Kathrine Growdon as Countess Charlotte Malcolm and Rebecca Jo Loeb as Petra. The Liebeslieder Singers include Emily Hindrichs, Charlene Santoni, Kristen Hoff, Mark Van Arsdale and Christopher Johnstone.

Casey Hushion directs the concerts with musical direction by Larry Goldberg. The libretto was adapted by Lawrence Goldberg. Tim Bennett is the assistant stage director. A Little Night Music — featuring a score by Sondheim and a book by Wheeler — originally opened at Broadway's Shubert Theatre on Feb. 25, 1973, with a cast that included Glynis Johns as Desiree, Len Cariou as Fredrik and Hermione Gingold as Madame Armfeldt. The show, directed by Harold Prince, garnered five 1973 Tony Awards, including one for Best Musical. The Sondheim score features the composer's best-known tune, "Send in the Clowns," as well as "Every Day a Little Death," "The Miller's Son" and "A Weekend in the Country."

For more information visit www.bso.org or www.tanglewood.org.