Sleepytime Gorilla Museum

Sleepytime Gorilla Museum
Performing live in 2003
Background information
Origin	Oakland, California, United States
Genres	Experimental rock, avant-garde metal, progressive rock, progressive metal
Years active	1999–present
Labels	The End Records
Associated acts	2 Foot Yard, Charming Hostess, Rabbit Rabbit Radio, Cosa Brava, Faun Fables, Free Salamander Exhibit, Idiot Flesh, Immersion Composition Society, inkBoat, MOE!KESTRA!, Mute Socialite, Skeleton Key, Species Being, The Book of Knots, Thin Pillow, Thinking Plague, Tin Hat, Vacuum Tree Head
Website	Official website
Members	Matthias Bossi Nils Frykdahl Carla Kihlstedt Michael Iago Mellender Dan Rathbun
Past members	Frank Grau David Shamrock Moe! Staiano

Sleepytime Gorilla Museum (often abbreviated to SGM) is an American experimental rock band, formed in 1999 in Oakland, California. The band fuses classical, industrial, and art-rock themes throughout their music. They are known to perform elaborate routines on stage and discuss possibly fictitious stories of dada artists and mathematicians.

After the disbanding of Idiot Flesh, Dan Rathbun and Nils Frykdahl joined with Charming Hostess member Carla Kihlstedt (of which Rathbun and Frykdahl were also members) to form Sleepytime Gorilla Museum with Moe! Staiano and David Shamrock. Their first performance, on June 22, 1999, was to a single banana slug (Ariolimax dolichophallus). The following night's performance was their first to a human audience.

Some time during the recording of Grand Opening and Closing (2001), drummer David Shamrock left the band and was replaced with Frank Grau. Grau also co-released the album, instigated their first tour and managed the band.

During the recording of the follow-up, Of Natural History (2004), Grau left the band and was replaced with a new drummer, Matthias Bossi, formerly of Skeleton Key. The Of Natural History tour saw Moe! Staiano's exit, and new multi-instrumentalist Michael Iago Mellender's entrance. In January 2006 Sleepytime Gorilla Museum signed to The End Records who re-released their début Grand Opening and Closing with three bonus tracks.

During early 2007, the title and track list for their third studio album, In Glorious Times was announced with the release date set for May 29, 2007. Prior to the release, an mp3 and music video of "Helpless Corpses Enactment" were made available online.