Ruth Underwood
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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
Credits

Zappa (2020)
as Self - Played with Zappa 1967-1976

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

200 Motels (1971)
as Fake Drummer

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

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

Frank Zappa: A Token Of His Extreme (2013)
as Herself

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

Frank Zappa: The Dub Room Special! (1982)
as Self
An American Dissident: un tributo a Frank Zappa (1994)
as Self (archive footage)

Frank Zappa: The Broadcast Archives (2008)
as Self

Classic Albums: Frank Zappa - Apostrophe (') Over-Nite Sensation (2007)
as Self

Frank Zappa: A Token of His Extreme (2005)
as Herself

Cheepnis (2014)
as Herself
The Drummers of Frank Zappa Roundtable Discussion and Performance (2010)
as Self

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

Video from Hell (1987)
as Self

Frank Zappa: Roxy, 1973 (2007)
Actor

Frank Zappa: Opopoppa Stockholm, Sweden (1973)
Actor





