“Amy Tan: Unintended Memoir” producer Karen Pritzker and author and subject of the film Amy Tan discussed the chance circumstances that led to the film’s creation.

At Sundance Film Festival’s Variety studio presented by AT&T TV, Pritzker and Tan, author of the beloved “The Joy Luck Club” and lead singer in the literary rock garage band The Rock Bottom Remainders, remembered the doc’s late director and reflected on its unique cinematography.

Tan said the documentary , which will appear on “American Masters,” didn’t initially appeal to her. It was director James Redford, who died last October at the age of 58 from cancer, who had to convince her to agree to the film.