Junior Boys began as a duo with its duties split between Jeremy Greenspan and Johnny Dark. Influenced by a number of music sectors — including arty synth pop, minimal techno, U.K. garage, and contemporary hip-hop — they made a demo with no positive results. Dark opted to leave the group, but former Warp employee Nick Kilroy eventually heard the songs and became interested enough to begin his KIN label with Junior Boys as its first artist. Engineer Matt Didemus joined Greenspan, and together they recorded enough material for a full-length. Prior to the 2004 release of the resulting album, titled Last Exit, a pair of 12 singles were released — one included a remix from Fennesz, while the other featured a remix from Manitoba (now Caribou).

Three months after Last Exits initial U.K. release, Domino picked up the album for distribution in the U.S. The Domino version added a bonus disc with B-sides and remixes from the 12 releases. The relatively slick So This Is Goodbye followed in 2006. The single In The Morning was featured in an iTunes commercial in 2007.

On July 10, 2007, Junior Boys second album was revealed as being on the shortlist for the 2007 Polaris Music Prize. They did not ultimately win the prize.

In September 2008, Morgan Geists new album Double Night Time was released with five songs performed by Jeremy Greenspan.

On January 16, the duo announced in an official press release that their third full length album would be title Begone Dull Care, and released on March 24 2009 in Canada, April 7 in the United States and May 11 in Germany.

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