RODDY RICH CHARGED WITH A WEAPON BEFORE PERFORMANCE

According to TMZ Roddy Ricch won't be on stage for his Governor's Ball performance in NYC today -- instead, he's in NYPD custody for multiple gun charges ... TMZ Hip Hop has learned.

Roddy and his crew were stopped at a security checkpoint for the huge festival going officers say they found a loaded firearm inside the vehicle he was taking to the show. Cops say there are about 9 rounds of ammo as well as a large-capacity magazine.

Roddy was arrested, along with 2 other people in the vehicle. Roddy's been hit with 4 counts of criminal possession of a weapon, possession of a large capacity ammo feeding device, and unlawful possession of that device.

The festival had to break the news to sad fans ahead of his performance.