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.

KNOWN FOR

Classic Albums
2007
Zappa
2020
Eat That Question: Frank Zappa in His Own Words
2016
Classic Albums: Frank Zappa - Apostrophe (') Over-Nite Sensation
2007
Classic Albums: Frank Zappa & The Mothers Of Invention - Freak Out!
2021
An American Dissident: un tributo a Frank Zappa
1994
Frank Zappa & The Mothers: Roxy: The Movie
2015
The True Story of Frank Zappa's 200 Motels
1988
Frank Zappa: The Dub Room Special!
1982
200 Motels
1971
Frank Zappa: The Broadcast Archives
2008
Frank Zappa: Cheaper Than Cheep
2025

FILMOGRAPHY

All
Movies
TV
Acting
19
2025
Frank Zappa: Cheaper Than Cheep
as Self (percussion)
2021
Classic Albums: Frank Zappa & The Mothers Of Invention - Freak Out!
as Self
2020
Zappa
as Self - Played with Zappa 1967-1976
2016
Eat That Question: Frank Zappa in His Own Words
as Self (archive footage)
2015
Frank Zappa & The Mothers: Roxy: The Movie
as Herself
2014
Cheepnis
as Herself
2013
Frank Zappa: A Token Of His Extreme
as Herself
2010
The Drummers of Frank Zappa Roundtable Discussion and Performance
as Self
2008
Frank Zappa: The Broadcast Archives
as Self
2007
Classic Albums: Frank Zappa - Apostrophe (') Over-Nite Sensation
as Self
2007
Frank Zappa: Roxy, 1973
2007
Classic Albums
as Self
2005
Frank Zappa: A Token of His Extreme
as Herself
1994
An American Dissident: un tributo a Frank Zappa
as Self (archive footage)
1988
The True Story of Frank Zappa's 200 Motels
as Self (archive footage)
1987
Video from Hell
as Self
1982
Frank Zappa: The Dub Room Special!
as Self
1973
Frank Zappa: Opopoppa Stockholm, Sweden
1971
200 Motels
as Fake Drummer