Ruth Underwood
 | Frank Zappa: Cheaper Than Cheep (2025) (percussion) |
 | Classic Albums: Frank Zappa & The Mothers Of Invention - Freak Out! (2021) Self |
 | Zappa (2020) Self - Played with Zappa 1967-1976 |
 | Eat That Question: Frank Zappa in His Own Words (2016) Self (archive footage) |
 | Frank Zappa & The Mothers: Roxy: The Movie (2015) Herself |
 | Cheepnis (2014) Herself |
 | Frank Zappa: A Token Of His Extreme (2013) Herself |
 | The Drummers of Frank Zappa Roundtable Discussion and Performance (2010) Self |
 | Frank Zappa: The Broadcast Archives (2008) Self |
 | Classic Albums: Frank Zappa - Apostrophe (') Over-Nite Sensation (2007) Self |
 | Frank Zappa: Roxy, 1973 (2007) |
 | Frank Zappa: A Token of His Extreme (2005) Herself |
| | An American Dissident: un tributo a Frank Zappa (1994) Self (archive footage) |
 | The True Story of Frank Zappa's 200 Motels (1988) Self (archive footage) |
 | Video From Hell (1987) Self |
 | Frank Zappa: The Dub Room Special! (1982) Self |
 | Frank Zappa: Opopoppa Stockholm, Sweden (1973) |
 | 200 Motels (1971) Fake Drummer |