The new version of the drama, adapted by Christopher Hampton and to be directed by Ian Rickson, is scheduled to begin previews at the Walter Kerr Theatre Sept. 16, with an opening night planned for Oct. 1.
Thomas will reprise on Broadway her Olivier Award-winning role of Arkadina in the critically acclaimed Royal Court Theatre production, while Sarsgaard will join the cast as the character of Trigorin.
Marking the Broadway debuts of both Thomas and Sarsgaard, the show's limited engagement is to end Dec. 21.
Thomas is best known for her roles in the films "The English Patient," "Four Weddings and a Funeral" and "Gosford Park."
Sarsgaard has starred in the movies "Kinsey," "Shattered Glass," "Garden State" and "Boys Don't Cry."