Under the Blacklight is the fourth and final full-length studio album released by American alternative rock band Rilo Kiley. It was released on August 20, 2007, in the United Kingdom - three years and three days after the release of their third album, More Adventurous. Warner Bros. Records released the album one day later in the United States. "Silver Lining" was No. 27 on Rolling Stone's list of the 100 Best Songs of 2007.

Rilo Kiley was an American indie rock band based in Los Angeles, California. Formed in 1998, the band consisted of Jenny Lewis, Blake Sennett, Pierre de Reeder, and Dave Rock.