Madonna was feisty at the New York Film Festival premiere of Steve McQueen’s acclaimed “12 Years a Slave.”

A spy said that as the movie began, “a blonde in black lace gloves wouldn’t stop texting,” seated in a row with Jason Ritter, J. Alexander and Michael K. Williams.

Finally, an audience member asked the blonde to stop, and the gloved one shot back: “It’s for business . . . enslaver!” During a roaring standing ovation, the blonde ducked out, and, “Sure enough, in black lace gloves, was Madonna!”

But it seems that the Material Girl was a fan of the film. Another spy said that as the credits rolled and she tried to swiftly make a dash from the theater, Madonna heard director McQueen’s voice as he began a Q&A. She was overheard saying, “‘I want to hear Steve speak,’ then rushed back in for the Q&A,” the source said.