In Your Honor is the fifth studio album by American rock band Foo Fighters, released as a double album on June 14, 2005 by Roswell and RCA Records. It consists of one disc containing heavy rock songs and a second disc with mellower acoustic songs. Frontman Dave Grohl decided to do a diverse blend of songs, as he felt that after ten years of existence, the band had to break new ground with their music. The album was recorded at a newly built studio in Northridge, Los Angeles, and features guests such as John Paul Jones (Led Zeppelin), Norah Jones, and Josh Homme (Queens of the Stone Age). Its lyrics deal with both resonating and introspective themes, with a major influence from Grohl's involvement on the campaign trail with John Kerry during the 2004 presidential election. It was the first album to feature keyboardist Rami Jaffee, although he would not join the band as full-time member until 2017.
The promotional tour for the album included both rock shows in stadiums and acoustic gigs in smaller venues. Reviews for In Your Honor were mostly positive, praising the composition and sound, although some critics found the album overlong and inconsistent. The album was also nominated for five Grammy Awards, and topped the charts in five countries—including Australia—and reached the top five in five more, including number two in both the United States and the United Kingdom. In Your Honor also broke the band's consecutive streak of Grammy Award for Best Rock Album wins that began in 1999 with There Is Nothing Left to Lose.
After touring in support of One by One, Dave Grohl was uncertain on what to do next with the Foo Fighters. He felt that rushing to do another record would not be creatively rewarding. Grohl considered a possible film score, and began writing acoustic songs, eventually amassing a full album's worth of songs. Grohl, not wanting to make a solo album and accepting the drift from his usual style, brought the songs to the Foo Fighters – "who's to say what we should sound like?". Bassist Nate Mendel replied that the songs' uncharacteristic sound was "why [they] should go on the record." Grohl decided against an acoustic record, saying "I have to have loud rock music in my life somewhere", and decided to make a double album, with "one CD that's all the really heavy rock shit" and another "that's really beautiful, acoustic-based, lower dynamic stuff", which Grohl described as "the bottle and the hangover", and also with the rock record being "my Jack and Coke record" with songs that "I realise I cannot live without that", and the acoustic being "my Sapphire-and-Martini-with-Kylie record". Grohl also stated a decisive moment in making a double album was uploading demos to his computer and realizing he had five hours of music, adding that "we've been a band for 10 years now, this is our fifth record, and I thought it would be boring to just keep making album after album and making videos and playing festivals, so I wanted to do something special."
The album was recorded in a new recording studio built in a warehouse in Northridge, California, named Studio 606 West in contrast to the original Studio 606 in Grohl's basement in Alexandria, Virginia. Development for In Your Honor took nine months with three and a half months installing equipment in the studio, and songs being written throughout 2004. While waiting for 606 to get finished, the band rehearsed on North Hollywood's Mates Rehearsal Studios, where "we ended up with three or four different versions of about 30 songs", according to Raskulinecz who added that "it got to the point where I didn't want them to play the rock songs anymore. I was afraid they were going to get stale."