| Un lugar llamado música (2022) Self |
| Robert Wilson – Die Schönheit des Geheimnisvollen (2022) Self |
| War and the Weather (2021) |
| The Last Dalai Lama? (2017) Self |
| Uncle Howard (2017) Self (archive footage) |
| Trophy (2017) Himself |
| What Difference Does It Make? (2014) Self |
| Paul Simon: Under African Skies (2012) Self |
| Lucinda Childs' Dance (2011) Self |
| Music (2010) Self |
| Richard Serra: Man of Steel (2008) Self |
| Wild Combination: A Portrait of Arthur Russell (2008) Self |
| Making Mishima (2008) |
| Patti Smith: Dream of Life (2008) Self |
| 365 Day Project (2007) |
| Glass: A Portrait of Philip in Twelve Parts (2007) Self |
| The Harry Smith Project Live (2006) Self |
| Kiki and Herb Reloaded (2005) Self |
| The Best of Secter & the Rest of Secter (2005) Self |
| Philip Glass: Looking Glass (2005) Himself |
| Essence of Life (2002) Interviewee |
| Impact of Progress (2002) Self |
| The Outsider: The Story of Harry Partch (2002) Himself (Interviewee) |
| In the Ocean (2001) |
| A Brief History of Errol Morris (1999) Self |
| The Source (1999) Self |
| The Truman Show (1998) Keyboard Artist |
| Perfect Moment (1997) Self |
| Classic Albums: Paul Simon - Graceland (1997) Self |
| Robert Wilson and the Civil Wars (1987) |
| A Composer’s Notes: Philip Glass and the Making of an Opera (1986) Himself |
| The Kitchen Presents: Two Moon July (1986) |
| Bye Bye Kipling (1986) Self |
| Einstein on the Beach: The Changing Image of Opera (1985) composer (himself) |
| Four American Composers: Philip Glass (1983) Himself |
| What Maisie Knew (1975) |
| Music with Roots in the Aether: Opera for Television by Robert Ashley (1974) Self |
| Hands Scraping (1968) |
| The Making of "Once Within a Time" Self |
| New Music: Sounds and Voices from the Avant-Garde New York 1971 Self |