Trey Gunn (born December 13, 1960) is an American musician, known for being in the progressive rock band King Crimson from 1994 to 2003.

From 1988 to 1991, he toured playing a Chapman Stick in the UK and Europe, with Toyah Willcox, Robert Fripp, and Paul Beavis.

In 1992, Gunn was asked to join David Sylvian and Robert Fripp in a collaborative project that toured the United States, Europe, and Japan.

[3] He has also performed and recorded with a number of other musicians: Tool, Puscifer, Brian Eno, Robert Fripp, Sean Malone and Gordian Knot, David Sylvian, Vernon Reid, John Paul Jones, Eric Johnson, Jerry Marotta, Alice, Azam Ali, Matt Chamberlain, Michael Brook, Bill Rieflin, David Hykes of the Harmonic Choir and many more.

In 2003, Gunn founded the multi-media group Quodia with Joe Mendelson where he has contributed more vocals than in previous projects and less Warr guitar.

In 2004, he and Pat Mastelotto started collaborating with Kimmo Pohjonen and Samuli Kosminen, forming KTU out of their respective duos, TU and Kluster.