Fly on the Wall is the tenth studio album by Australian hard rock band AC/DC, released on 28 June 1985 by Albert Productions, and Atlantic Records. It was the band's ninth internationally released studio album and the tenth to be released in Australia. All songs were written by Angus Young (guitar), Malcolm Young (guitar), and Brian Johnson (vocals). The album was re-released in 2003 as part of the AC/DC Remasters series.

Although AC/DC's 1983 album Flick of the Switch had gotten mixed reviews from critics, the band remained one of the biggest hard rock acts in the world. In October 1984, Atlantic Records in the United States released the EP '74 Jailbreak, a collection of previously unheard studio tracks culled mainly from the band's 1975 Australian debut High Voltage, which was well received by fans. In January 1985, the band took three weeks off from recording what would become Fly on the Wall to headline two nights at the 10-day Rock In Rio festival in Rio De Janeiro, Brazil, appearing to over 250,000 people on 19 January with Scorpions, Whitesnake, and Ozzy Osbourne.

The sessions for Fly on the Wall took place in Montreux, Switzerland at Mountain Studios in late October 1984. Released on 28 June 1985, it was AC/DC's first album since the original Australian version of High Voltage not to include drummer Phil Rudd, who was replaced by Simon Wright (although Wright appeared in music videos for Flick of the Switch tracks), making it the first AC/DC album with all band members born in the UK.

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