In Berlin at the Berlinale-Premiere, Casey Affleck said that he began writing the screenplay for this movie 10 years earlier.
Casey Affleck revealed on a Jimmy Kimmel Live interview that the 12 minute uncut opening scene took "8 hours" to shoot and that he "was always the one to mess it up." Affleck also revealed that his costar Anna Pniowsky knew both her lines and his.
Casey Affleck revealed on a Jimmy Kimmel Live interview that he "had a good mom," but was never given bedtime stories growing up. Affleck made up the opening scene bedtime story. "It was a story I actually told one of my kids, and I was like, 'that's not bad,' and I went and wrote it down."
"The first cut was three hours, and then it got down to two and a half. And then, was the very difficult process of getting from two and a half to under two, which was a contractual obligation to deliver a movie under two hours. It's good because the movie is plenty long. It really takes its time." -Casey Affleck
Casey Affleck on the movies that influenced the suspense scenes of Light of My Life (2019), "A movie called Jeanne Dielman (1975), creates great tension with a static camera and sustained shots. Ida (2015) was another inspiration for this, the way it was shot."