Angelo Massagli and Caitlin Hale met as co-workers. They were 10 years old.

The pair, former child actors, were both cast in the 2003 film “School of Rock” in which Jack Black plays a substitute teacher who creates a rock band out of his classroom of musically gifted elementary-aged prep schoolers. Ms. Hale’s character was a braided pigtail-wearing backup singer named Marta. Mr. Massagli played Frankie, who was part of the band’s peewee security detail.

Mr. Massagli recalled being spontaneously asked to sing at his audition for the film in New York City. He was nervous to perform after Ms. Hale, who had just impressed the production team with her voice, including a rendition of “Everything’s Coming Up Roses” in which she changed the lyrics to be about the film’s director.