Southpaw, the upcoming boxing film starring Jake Gyllenhaal, marks one of the last films to feature a score composed by the late James Horner.
Horner died unexpectedly last month in a plane crash. Shortly after Horner's death, Southpaw director Antoine Fuqua said of the composer, "He was a legend, an artist and a great friend…He was magical to work with, and I feel blessed that we had the opportunity to collaborate together."
In addition to Southpaw, Horner also did the music for Chilean miner drama, The 33, set to hit theaters in November.
But he also, secretly, created music for another movie, Fuqua revealed on NPR's All Things Considered.
"I just found out a couple days ago his team flew out here to Baton Rouge, and they brought me all the music from Magnificent Seven," Fuqua said. "He had already wrote it for me based on the script."
Evidently Horner wanted to surprise Fuqua with what the director called "glorious" music for his upcoming remake, starring Denzel Washington, Chris Pratt, Ethan Hawke, Matt Bomer, Vincent D'Onofrio and Peter Sarsgaard.
Fuqua added that Horner did the Southpaw score for free because he was such a fan of the film.
"He called me on a Saturday, after he watched the movie, and I said, 'I don't have any money' because it wasn't a big budget movie," Fuqua explained. "And he said to me, 'I love the movie. I love the father-daughter relationship. Don't worry about the money. I'm just going to do it.' And he did it for nothing. He paid his crew out of his own pocket."
Fuqua said Horner was a family man who loved his children and added about the composer, "He was an incredible human being. He was a filmmaker through and through. He was one of the most gentle people I've ever met. Even the way he spoke was very soft and thoughtful. He was magical. And he had this childlike wonderment in his eyes, but he was an amazing artist, an amazing poet. And I loved him, and we became friends."
Southpaw hits theaters Friday.
Listen to Fuqua's full All Things Considered interview below.
This article originally appeared in THR.com.