(CNN) — Diane Keaton , known for her unique brand of comedic timing and inimitable style, has died. Stars from Goldie Hawn to Bette Midler to Steve Martin expressed their love of the actor after hearing the news, paying tribute to “just a truly original person,” as Reese Witherspoon put it.

“It’s hard to believe,” said Jane Fonda in a tribute.

Keaton was 79, and the cause of her death was not immediately available. A spokesperson for the Los Angeles Fire Department told CNN that they received a call for medical assistance on Saturday morning at Keaton’s address and paramedics transferred a person to a hospital. A law enforcement source confirmed the person transported was Keaton.

Keaton was a celebrated and prolific actor whose career spanned decades, early on earning an Academy Awar

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