Harbour, last seen on Broadway in The Merchant of Venice opposite Pacino, will play John Williamson. Schiff, best known for his Emmy-winning performance as Toby Zeigler on NBC's The West Wing, will make his Broadway debut as George Aaronow. Shamos, who received a Tony nomination for his performance in Clybourne Park, will play James Lingk.
As previously announced, Cannavale will play Ricky Roma to Pacino's Shelley Levine.
The production will feature scenic design by Eugene Lee, costume design by Jess Goldstein, and lighting design by James F. Ingalls.
Glengarry Glen Ross will be produced by Jeffrey Richards, Jerry Frankel and Jam Theatricals, the same team behind the work's last Broadway revival, in 2004.