Hollywood legends and mother-daughter duo Debbie Reynolds and Carrie Fisher died a day apart in December 2016.
Bright Lights, directed by Alexis and Fisher Stevens, allows viewers a peek into the lives of the two stars, as they battle age and mental illness while juggling their professional lives.
HBO has released the first, heartwarming trailer of the documentary. Watch:
The documentary is set to air on HBO on 7 January.
With inputs from NBC News