Mary Steenburgen, Jane Fonda & Candice Bergen

Diane's Book Club costars each shared individual tributes for the late actress.

The Elf actress emphasized that her late friend was "magic."

"There was no one, nor will there ever be, anyone like her," she wrote in a statement. "I loved her and felt blessed to be her friend. My love to her family. What a wonder she was!!!"

"It’s hard to believe...or accept…that Diane has passed," Jane wrote in her own Instagram post. "She was always a spark of life and light, constantly giggling at her own foibles, being limitlessly creative... in her acting, her wardrobe, her books, her friends, her homes, her library, her worldview. Unique is what she was. And, though she didn’t know it or wouldn’t admit it, man she was a fine actress!"

Meanwhile, Candice wrote in her post, "This is a huge loss, both personally and for all of us."

The Miss Congeniality actress continued, "Diane was a true artist – tremendously gifted and uniquely talented in so many disciplines, yet also modest and wonderfully eccentric. I will miss her terribly."