HBO's Bright Lights documentary is being moved up to a Jan. 7 air date after the passing of its subjects, Hollywood icons Carrie Fisher and Debbie Reynolds.

The premium cabler had originally planned to air the doc in March. The project, directed by Alexis Bloom and Fisher Stevens, premiered in May at the Cannes Film Festival, where Fisher promoted the title.

"Individually, Carrie Fisher and Debbie Reynolds were remarkable women," the two directors said Friday in a statement. Debbie was a consummate professional: she made performing seem effortless, but underneath her elegance was a staggering work ethic that honored her craft, and her beloved audience. Carrie was seemingly the opposite — candid and loose, her wit pushed boundaries in mischievous ways. But both were supremely kind human beings, and unusually perceptive. And when either one entered a room, the energy changed. Quite simply, we were iron filings to their magnets. And never more so than when they were together. These women were more than mother and daughter, they were an expression of exquisite humanity in all its travail and triumph. They lived their days boldly. They sung every song worth singing (often together). Carrie and Debbie loved each other profoundly. We are devastated they're gone. And so very fortlunate to have known them at all."

In his review, The Hollywood Reporter's David Rooney wrote: "if the film is as disorderly in its structure as the messy family history it surveys, time spent with these wonderful subjects makes that seem sweetly appropriate."

The critic also noted of the depiction of Reynolds and Fisher: "Their loving interdependence seems unbreakable." Fisher died on Tuesday, days after suffering a heart attack, at age 60. Reynolds died a day later, on Wednesday, at age 84.

HBO billed Bright Lights as "featuring vintage family films that bring iconic old-world Hollywood to life, as well as extensive vérité footage."

Bright Lights: Starring Carrie Fisher and Debbie Reynolds is set to air Saturday, Jan. 7, at 8 p.m. ET/PT on HBO.