GET OUT! BIZZY BONE IS HEADED TO CELEBRITY REHAB!

Celebrity Rehab is all set to add another star to its cast -- "Bone Thugs-N-Harmony" rapper Bizzy Bone. We're told Bizzy - real name Byron McCane -- wants to seek treatment for an addiction to marijuana and alcohol.

As we've previously reported, the producers behind the VH1reality show starring Dr. Drew have been on a mission to lock down a cast -- and fast ... or else the show could be in danger.

If the show survives -- Bizzy could join Tila Tequila and Jason Wahler inside the rehab facility.