Pretty. Odd. is the second studio album by American pop rock band Panic at the Disco, first released in the Netherlands on March 21, and released in the US on March 25, 2008 by Decaydance and Fueled by Ramen. Recorded at the Studio at the Palms in Paradise, Nevada with additional production at Abbey Road Studios in London with producer Rob Mathes, the album was inspired by baroque pop and the works of the Beach Boys and the Beatles, with its psychedelic-styled rock sound differing greatly from the techno-influenced pop-punk of the band's previous album A Fever You Can't Sweat Out (2005). It is the band's only major release to not feature an exclamation point in their name, being credited as "Panic at the Disco" for all major activities until summer the following year.

To begin work on the record, Panic at the Disco retreated to a cabin in the rural mountains of Mount Charleston, in the group's native state of Nevada. Upon growing dissatisfied with their final product, the band scrapped the entire album and spent time writing and recording Pretty. Odd. throughout the following winter. Production came together quickly and each song written made the cut. Additional recording, such as strings and horns, were produced at Abbey Road Studios. It is the only album to feature bassist Jon Walker, and last to feature vocalist and lead guitarist Ryan Ross as both left the band in 2009, a year after the album's release.

The record received a generally positive critical response, but under-performed commercially in the aftermath of its quadruple-platinum-selling predecessor, instead only achieving platinum status. The album spent 18 weeks on the Billboard 200, peaking at number two, and the album's lead single "Nine in the Afternoon" was certified triple platinum by the RIAA. The album has since gathered a cult following and sold 422,000 copies by 2011.