EXCLUSIVE: “Mother and I live next door to each other, separated by one daunting hill,” Carrie Fisher explains in this HBO Documentary Films feature, having its world premiere this week at Cannes. “I usually come to her. I always come to her.” HBO calls Bright Lights “an intimate portrait of Hollywood royalty, in all its eccentricity.” At 83, Debbie Reynolds (Singin’ In The Rain, The Unsinkable Molly Brown) still performs a Las Vegas act, sheathed in gold lamé. But performing takes its toll and her health suffers. This devastates her daughter, Star Wars actress Carrie Fisher, whose response is at once hilarious, common sensical — and heartbreaking.

With vintage family films, photos and other material, an iconic Hollywood tale is told. And cinema verité reminiscent of Grey Gardens takes us to into the heart of Beverly Hills today, where mother and daughter live side by side in a powerful story about showbiz and bittersweet family bonds.

Bright Lights is directed by Alexis Bloom and Fisher Stevens and executive produced by HBO’s Sheila Nevins and RatPac’s Brett Ratner. HBO says the docu will air early next year.

Check out the clip above.