Rock of Ages: The Definitive Collection is the North American version of the second compilation album by the English rock band Def Leppard. The two-disc anthology featuring 35 hit songs by the band and was released in North America on 17 May 2005. The album charted at No. 10 on the Billboard 200.

Best of Def Leppard is a compilation album featuring some of Def Leppard's most popular songs. The album charted at No. 6 on the UK Albums Chart.