The League and the American Federation of Musicians Local 802 — which represents roughly 1,200 Broadway musicians — reached a tentative labor agreement overnight, according to sources familiar with the talks told NY1. 

The deal, which must still be ratified by members, averts a potential strike that could have darkened Broadway theaters.

The breakthrough came days after another key union, Actors’ Equity Association, announced a tentative three-year contract with the League over the weekend

That agreement covers more than 51,000 actors, singers, dancers and stage managers, addressing issues such as health care, scheduling and physical therapy.

Both unions had been working under expired contracts.

The tentative agreements mark a significant step toward labor stability on Broadway after weeks of tense negotiations. 

A walkout by either union could have shut down productions during one of the industry’s busiest times of year.

The most recent major Broadway strike occurred in 2007, when a 19-day work stoppage by stagehands shut down more than two dozen shows and cost producers and the city millions in lost revenue.