Def Leppard is a renowned English rock band that has made a significant impact on the music scene since their formation in Sheffield in 1977. Known for their anthemic sound and pioneering contributions to the heavy metal genre, they achieved worldwide fame in the 1980s and became one of the best-selling music artists in history. Their notable single "Photograph," from the iconic album "Pyromania," released in 1983, helped cement their status as rock legends.

The band's origins trace back to the late 1970s when they were initially known as Deaf Leopard. Def Leppard's early lineup was formed by guitarist Pete Willis, bassist Rick Savage, drummer Tony Kenning, and lead vocalist Joe Elliott. Their debut album, "On Through the Night," released in 1980, reached the Top 15 in the UK but did not gain much traction in other regions. However, their second album, "High 'n' Dry," released in 1981, produced the hit single "Bringin' On the Heartbreak," which became one of the first rock videos aired on MTV in 1982. This marked the beginning of their rise to prominence, aided by the production talents of Mutt Lange, who helped define their melodic hard rock style.

In 1983, Def Leppard released "Pyromania," which was a critical and commercial success, thanks in part to the addition of guitarist Phil Collen, who replaced Willis. The album reached No. 2 on the US album chart and was certified Diamond by the RIAA, reflecting over ten million sales. It featured two major hits, "Photograph" and "Rock of Ages," both of which topped the US Rock Tracks chart. The band's sound evolved further with the release of their fourth studio album, "Hysteria," in 1987. This album showcased a more polished, pop-oriented style and became a worldwide phenomenon, selling over 15 million copies and spawning six Top 20 US singles, including the chart-topping "Love Bites" and the iconic "Pour Some Sugar on Me."

Tragedy struck the band in 1991 with the untimely death of guitarist Steve Clark. Despite this loss, Def Leppard continued to thrive, releasing "Adrenalize" in 1992 as a four-piece band. The album debuted at No. 1 in multiple countries and included hits like "Let's Get Rocked" and "Have You Ever Needed Someone So Bad." Their subsequent release, "Retro Active," in 1993 featured the acoustic hit "Two Steps Behind," further solidifying their legacy.

Over their career, Def Leppard has sold more than 100 million records worldwide, making them one of the best-selling bands of all time. They have received RIAA diamond certification for two of their albums, "Pyromania" and "Hysteria," making them one of only five rock bands to attain this distinction for multiple original studio albums. Their influence has been recognized through numerous accolades, including being ranked No. 31 in VH1's "100 Greatest Artists of Hard Rock" and No. 70 in "100 Greatest Artists of All Time." In 2019, they were inducted into the Rock and Roll Hall of Fame, further cementing their legacy in the annals of rock music history.

Today, Def Leppard continues to tour and perform, captivating audiences with their timeless hits and energetic live shows, proving that their legacy is far from over. Their enduring appeal lies not only in their music but also in their ability to connect with fans across generations, ensuring their place in the pantheon of rock greatness.