The rockers, who were inducted into the Hall of Fame in 2019, shared video of their visit, where they got to check out items in the Rock Hall's vault.
Def Leppard also checked out their own exhibit, which features a suit Elliott says he wore just one time for the cover of Rolling Stone to promote 1992's Adrenalize.
Def Leppard's Summer Stadium with Journey hits Citi Field in New York on Wednesday. A complete list of dates can be found at defleppard.com.