Ruth Underwood (born Ruth Komanoff; May 23, 1946) is an American musician best known for playing xylophone, marimba, vibraphone, and other percussion instruments for Frank Zappa and his band The Mothers of Invention. She played for Zappa from 1968 until his death. She married fellow Zappa musician Ian Underwood.
2025Frank Zappa: Cheaper Than CheepMovieas Self (percussion)2021Classic Albums: Frank Zappa & The Mothers Of Invention - Freak Out!Movieas Self2020ZappaMovieas Self - Played with Zappa 1967-19762016Eat That Question: Frank Zappa in His Own WordsMovieas Self (archive footage)2015Frank Zappa & The Mothers: Roxy: The MovieMovieas Herself2014CheepnisMovieas Herself2013Frank Zappa: A Token Of His ExtremeMovieas Herself2008Frank Zappa: The Broadcast ArchivesMovieas Self2007Classic Albums: Frank Zappa - Apostrophe (') Over-Nite SensationMovieas Self2007Frank Zappa: Roxy, 1973Movie2005Frank Zappa: A Token of His ExtremeMovieas Herself1997Classic AlbumsTV showas Self · 2 episodes1988The True Story of Frank Zappa's 200 MotelsMovieas Self (archive footage)1987Video from HellMovieas Self1982Frank Zappa: The Dub Room Special!Movieas Self1973Frank Zappa: Opopoppa Stockholm, SwedenMovie1971200 MotelsMovieas Fake Drummer