Def Leppard signed a contract with Phonogram Records with an initial advance of £120,000 ($180,000) and a 10 percent share of sales during the first two years.
Rick Allen made his first live return to the stage with Def Leppard after losing his left arm in a car accident. It took place at the Monsters of Rock festival at Castle Donington.
Def Leppard's fourth studio album "Hysteria" reached No. 1 on the UK album chart. The album also reached No. 1 in the US the following July after 49 weeks of gradual ascent. It also reached No. 1 in Australia, Norway, and New Zealand, and sold more than 20 million copies worldwide.