Robert Viharo (gebore 14 Augustus 1942) is 'n Amerikaanse akteur en skrywer. Hy is bekend vir sy rolle in die rolprente Valley of the Dolls (1967), I Never Promised You a Rose Garden (1977), en Marbles (2005), en in die televisiereeks American Playhouse (1981).
- 1967: Valley of the Dolls
- 1968: Stuntman
- 1975: Return to Macon County
- 1977: I Never Promised You a Rose Garden
- 1977: Bare Knuckles
- 1980: Happy Birthday, Gemini
- 1980: Hide in Plain Sight
- 1986: The Night Stalker
- 2000: Stroke
- 2002: Noise
- 2003: Attitude
- 2005: Marbles
- 2007: Used
- 2007: Go Together
- 2008: Presque Isle
- 2013: What Mad Pursuit?
