Hollywood lost two of its most enduring icons last week when actress/author/activist Carrie Fisher and her mother, Singin’ in the Rain star Debbie Reynolds, passed away within 24 hours of each other. Like any mother and daughter, Fisher and Reynolds had their disagreements over the years. Unlike for most other mothers and daughters, those disagreements made for public fodder. There was even a 10-year period where they did not speak—but their bond grew even stronger once they were reunited, and the two eventually became neighbors. It’s that fascinating relationship that is at the center of Bright Lights, Alexis Bloom and Fisher Stevens’s new documentary, which offers an inside glimpse at the duo's ups and downs over the years.

While the film, which made its debut at Cannes last year, was originally set to air on HBO in March, the network moved up its premiere date to Saturday, January 7 at 8 p.m. You can get a sneak peek via the trailer below.