Legendary rap trio Run-D.M.C.'s first four studio albums will be reissued in expanded form Sept. 5 via Arista/Profile/Legacy, Billboard.com has learned.

Legendary rap trio Run-D.M.C.'s first four studio albums will be reissued in expanded form Sept. 5 via Arista/Profile/Legacy, Billboard.com has learned. "Run-D.M.C." (1984), "King of Rock" (1985), "Raising Hell" (1986) and "Tougher Than Leather" (1988) all feature rare and previously unreleased bonus tracks.

Presaged by the single "It's Like That"/"Sucker M.C.'s" (both reprised here), the self-titled debut introduced Run-D.M.C.'s signature brand of back-and-forth rhymes and rock-influenced, drum-heavy tracks. The album is here expanded with a previously unreleased mix of "Rock Box," live versions of "Here We Go" and "Sucker M.C.'s" and a track called "Russell and Larry Running at the Mouth."

Led by such favorites as "You Talk Too Much" and "Rock the House," "King of Rock" began to foreshadow Run-D.M.C.'s eventual explosion into the mainstream, reaching No. 52 on The Billboard 200. The new edition includes the original version of "Slow and Low," later recorded by the Beastie Boys on "Licensed To Ill"; the previously unreleased long version of "Jam-Master Jammin'"; the B-side "Together Forever"; and a version of "King of Rock" recorded at Live Aid in 1985.

Run-D.M.C. became a cultural phenomenon thanks to "Raising Hell," which soared to No. 3 on The Billboard 200 on the strength of tracks like "You Be Illin'" and a remake of Aerosmith's "Walk This Way." The latter group's Steven Tyler and Joe Perry appeared on the song and in the iconic video, which revealed hip-hop to millions of young listeners.

The expanded version includes five previously unreleased extras: an a cappella version of "My Adidas," the original "Walk This Way" demo, "Lord of Lyrics," a "Raising Hell" tour radio ad and a commercial for "Live at the Apollo."

"Tougher Than Leather" is bolstered by an instrumental version of "Beats to the Rhyme," the demo for "How'd Ya Do It Dee," an unreleased song called "Crack," the seasonal "Christmas in Hollis" and an April 1987 commercial for Penthouse magazine. A liner notes essay by Public Enemy's Chuck D can be found on the group's official Web site.

As previously reported, Run-D.M.C.'s Reverend Run and his family will be the subject of an MTV reality show, "Run's House," due to premiere later this year. The artist is also at work on his debut solo album.