Less than an hour after Brooklyn’s J’Ouvert festival officially kicked off Monday morning, cops said, they made at least one gun arrest at the raucous dawn celebration that has in the past been marred by violence.

The NYPD’s 71st Precinct tweeted about the bust, saying: “71 cops continue the fight against violence and crime. Anti Crime Team removes another illegal handgun from the street keeping our neighborhood safe during Jouvert festivities!”

In years past, J’Ouvert has been plagued by violence, prompting police to beef up security.

Carey Gabay, an aide to Gov. Andrew Cuomo, was fatally shot in 2015 when he got caught in gang crossfire during the pre-parade party.

“It’s nothing like it was in previous years,” one Washington Avenue shopkeeper said of J’Ouvert. “There used to be so many people and it’s a lot less [this year].”

The annual Caribbean cultural fest in Crown Heights kicked off at 6 a.m. and will go until 11 a.m.

At noon, the West Indian Day Parade begins along Eastern Parkway.