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Yesterday, news broke that Zac Efron had gone to rehab for alcohol abuse.

This morning, Harvey Levin called in and said TMZ has now confirmed that it was actually a lot more serious than that. Zac was addicted to cocaine.

Earlier this year, while he was filming "Neighbors" with Seth Rogan, Zac wouldn't show up to work and the cast and crew knew he was dealing with a serious issue.

Harvey also told us that Zac stayed at the MGM Grand in Vegas and ended up costing the hotel $50,000 in damages to his hotel room after a cocaine binge.

Here is what Harvey had to say: