Cast of The Conversation

Gene Hackman portrays Harry Caul, a paranoid and meticulous surveillance expert who becomes consumed by guilt over his latest assignment.

John Cazale plays Stan, Harry's assistant and friend who becomes increasingly concerned about Harry's state of mind.

Allen Garfield takes on the role of William P. 'Bernie' Moran, a shady character who hires Harry to conduct surveillance.

Frederic Forrest portrays Mark, an employee of Harry's who unknowingly becomes a key figure in the mysterious surveillance recordings.

Cindy Williams plays Ann, Harry's girlfriend who tries to understand his increasingly erratic behavior.

Michael Higgins portrays Paul, a partner of Harry's who becomes involved in the unfolding events.

Elizabeth MacRae takes on the role of Meredith, a woman involved in the case that Harry is surveilling.

Teri Garr plays Amy Fredericks, a woman with ties to the mysterious goings-on that Harry is investigating.

Harrison Ford portrays Martin Stett, a mysterious figure who becomes involved in the surveillance operation, raising suspicions.

Mark Wheeler plays the Receptionist, a minor character who interacts with Harry during his surveillance work.

Robert Shields takes on the role of The Mime, a character who unknowingly becomes entangled in the surveillance activities.

Phoebe Alexander portrays Lurleen, a woman involved in the events that Harry is trying to uncover through his surveillance work.