Eazy-E & Ol' Dirty Bastard -- RESURRECTED for Rap Festival

Eazy-E and Ol' Dirty Bastard are gearing up for their first performances since their deaths ... AS HOLOGRAMS ... and it's all going down in just a few months.

Promoters for the annual "Rock the Bells" hip hop festival have announced a "virtual" Eazy and a "virtual" ODB will perform on stage (a la Tupac) during shows in September and October.

According to AllHipHop.com ... hologram Eazy will perform with a living, breathing Bone Thugs-N-Harmony and O.D.B. will perform with members of the Wu Tang Clan.

Family members have reportedly signed off for both holograms.

Of course, hologram Tupac performed at Coachella last year ... and the fans LOVED IT.