Carrie Fisher's Half-Sisters: We Knew Debbie Reynolds "Would Not Last" Without Carrie

"You could see it in her face," said Joely Fisher, crying as she spoke. "She would not last without her on the planet. She wouldn't, and she didn't."

Carrie Fisher's half-sisters Joely and Tricia Lee Fisher spoke about losing their sibling in an interview with Good Morning America that aired on Tuesday's show.

Joely elaborated on comments she made in her guest column for The Hollywood Reporter, where she said Debbie Reynolds told her she was praying for more time with her daughter. Reynolds died a day after Carrie Fisher did.

"I knew that if Carrie wasn't going to survive this, that Debbie would not. You knew it," said Joely. Tricia Fisher added, You could feel it."

"You could see it in her face," said Joely, crying as she spoke. Reynolds "would not last without her on the planet. She wouldn't, and she didn't."

Tricia said they found out their half-sister had been hospitalized for cardiac arrest from the media. TMZ called Joely, who was on the phone with Tricia at the time. When they arrived at the hospital, Tricia said Carrie's daughter Billie Lourd was "rattled" but "handling everything."

Tricia said she remembers Carrie as "the coolest big sister in the world" and said she was "secretly soft." She said the three sisters "grew up without a father," since their dad, Eddie Fisher, would only come around once in a while.

Both sisters were emotional as they spoke about Carrie. Joely talked about Carrie reading diaries she kept from Star Wars to Joely 10 years ago and said she will miss getting to have one-on-one time with her.

Watch their interview with ABC News' Chris Connelly below.