Ruth Underwood
Biography
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.
Movie Appearances

200 Motels
as Fake Drummer
1971

Frank Zappa: The Dub Room Special!
as Self
1982

Cheepnis
as Herself
2014

The True Story of Frank Zappa's 200 Motels
as Self (archive footage)
1988

Video from Hell
as Self
1987
The Drummers of Frank Zappa Roundtable Discussion and Performance
as Self
2010

Eat That Question: Frank Zappa in His Own Words
as Self (archive footage)
2016

Zappa
as Self - Played with Zappa 1967-1976
2020

Classic Albums: Frank Zappa & The Mothers Of Invention - Freak Out!
as Self
2021

Frank Zappa: The Broadcast Archives
as Self
2008

Classic Albums: Frank Zappa - Apostrophe (') Over-Nite Sensation
as Self
2007
An American Dissident: un tributo a Frank Zappa
as Self (archive footage)
1994

Frank Zappa: A Token of His Extreme
as Herself
2005

Frank Zappa: A Token Of His Extreme
as Herself
2013

Frank Zappa & The Mothers: Roxy: The Movie
as Herself
2015

Frank Zappa: Opopoppa Stockholm, Sweden
1973

Frank Zappa: Roxy, 1973
2007

Frank Zappa: Cheaper Than Cheep
as Self (percussion)
2025
