Bud Cort as Brewster

Sally Kellerman as Louise

Michael Murphy as Shaft

William Windom as Weeks

Shelley Duvall as Suzanne

René Auberjonois as The Lecturer

Stacy Keach as Abraham Wright

John Schuck as Johnson

Margaret Hamilton as Daphne Heap

Jennifer Salt as Hope

Corey Fischer as Hines

G. Wood as Crandall

Bert Remsen as Douglas Breen

Angelin Johnson as Mrs. Breen

Dean Goss as Officer Ledbetter

Gary Chason as Camera Store Clerk

William Baldwin as Bernard

William Henry Bennet as Band Conductor

Ellis Gilbert as Butler

Verdie Henshaw as Feathered Nest Sanatorium Manager

Robert Warner as Asst. Mgr. Camera Store

Keith V. Erickson as Professor Aggnout

Thomas Danko as Color Lab Man

W.E. Terry Jr. as Police Chaplain

Ronnie Cammack as Wendel

Dixie Taylor as Mgr. Tanninger's Nursing Home

Pearl Coffey Chason as Nursing Home Attendant

Amelia Parker as Nursing Home Manageress

Marilyn Burns as Tour Guide (uncredited)

Harvey Keitel as The Photographer (uncredited)