Harry Caul
Stan
Bernie Moran
Mark
Ann
Paul
Meredith (as Elizabeth Mac Rae)
Amy
Martin Stett
Receptionist
The Mime
Lurleen
Man at Party (uncredited)
Boy in Church (uncredited)
TV Anchor (uncredited)
The Director (uncredited)
Confessional Priest / Security Guard (uncredited)
Salesman (uncredited)
Salesman at Surveillance Convention (uncredited)
Hotel Desk Clerk (uncredited)
Businessman (uncredited)
Man in Yellow Hat (uncredited)