Carrie Fisher 'already cremated' ahead of joint funeral with mum Debbie Reynolds

Debbie Reynolds Carrie Fisher

Debbie Reynolds Carrie Fisher

Titled Bright Lights, the film is set to air on HBO on January 7, and will serve as a fitting eulogy for the mother/daughter duo after they passed away within a day of each other at the tail end of a year ago.

With a connection so strong they died only one day apart, Carrie Fisher and her mother, Debbie Reynolds' loving relationship is the star of the first trailer of the HBO documentary.

Fisher, who famously played Princess Leia in Star Wars, died on 27 December after suffering a heart attack on a flight from London to Los Angeles days earlier.

Directors Alexis Bloom and Fisher Stevens have a masterful touch.

Joely and Tricia Fisher, Carrie's half-sisters, opened up about the Star Wars actress' death during an interview aired Tuesday on Good Morning America.

Although they were close during their final years, Carrie and Debbie both spoke about how their relationship had been fractured for decades. "The only way you make it through life is to fight", Debbie says in a shockingly unflattering moment that shows exactly where Carrie got her toughness from.

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Rest in peace, Debbie and Carrie.

And yet, according to Carrie, she and her mother shared one mind: "Far more than I ever would want to, I know what my mother feels and wants".

Some of Carrie's ashes will reportedly be buried with her. She was honored most notably as a co-founder of the Thalians, a charitable organization aimed at promoting awareness and treatment of mental health issues.

"My mother will forget she's not 35". "Aging is awful for all of us, but she falls from a greater height".

The TIFF screening will be followed by an audience conversation about the mother and daughter, "two heroines who broke ground for women in the movie industry". The nearly two-minute trailer is full of Reynolds and Fisher's amusing and clever conversations, as well as some truly heartfelt moments that make us miss the twosome even more.

Carrie Fisher and her daughter Billie Lourd.