The MacMillan Theatre, named for Canada 's most distinguished musician and former Dean of the Faculty, Sir Ernest Campbell MacMillan, was designed for the presentation of operas, guest productions, concerts, and recitals.

• The stage measures 134 feet in width, 50 feet in depth and 80 feet in height, one of the largest in Toronto.
• The orchestra pit is large enough to hold 60 musicians.
• The auditorium seats 815.
• Instrumental and vocal rehearsal halls are both the same size as the stage.
• It is equipped with complete lighting and recording facilties.