Joining Tony winner Easton (Invention of Love) and Tony nominee Ivey (Butley) will be Philip Goodwin (Tartuffe), Roberta Maxwell (Othello) and C. J. Wilson (Festen).
Tony nominee Paxton Whitehead, originally announced to appear in Home, has withdrawn from the production.
Two-time Tony Award winner Joseph Hardy stages David Storey's work that centers on four friends who meet in a park to "converse about life's events only to slowly reveal the reality of their strange circumstances."
Designing the production are Tobin Ost (set design), Alejo Vietti (costume design), Rui Rita (lighting design) and John Gromada (original music and sound design).
Running Aug. 13-24, Home marks the final offering of the Williamstown Theatre Festival's main stage season. Tickets are available by logging on to wtfestival.org or by calling (413) 597-3400.