"Nine in the Afternoon" is a song by American rock band Panic at the Disco, and the first single from the group's second album Pretty Odd. It is the band's first song release that did not include the exclamation mark at the end of the "Panic" in the group's name, and was also the first song written for the album. The video was filmed on December 20 and December 21. It was the first song written after the band decided to scrap an entire album of songs that the members had been planning to release in the autumn of 2007. Panic at the Disco's first performance of "Nine in the Afternoon" was at Virgin Festival 2007. The song has gone under changes in key and lyrics since first being performed. This song was number 44 on Rolling Stone's list of the 100 Best Songs of 2008.

On January 28, 2008 at 9:00pm, Panic at the Disco released "Nine in the Afternoon" via the group's MySpace page. Soon after, the band removed the song from that page and added a demo of another song from the new album, "We're So Starving". The following day, Apple added the single for download. The song impacted radio on February 19. As of March, "Nine in the Afternoon" has received moderate radio airplay. It has also been featured in the episode of the NBC television series Heroes titled "Cautionary Tales" and was included in the official television soundtrack album released in early 2008.

The song was covered by The Academy Is..., fellow Decaydance band, on Warped Tour 2008.

The song is also a playable song in the music video game Rock Band 2. It was also included on the soundtrack for the video game NHL 09, and was released as downloadable content for the games Just Dance 2 and Lips. It is also featured on the guitar game Guitar Rock Tour 2.

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