(KTLA) -- Hollywood is mourning the death of acting legend Robert Redford.

Celebrities took to social media to praise Redford's art, his advocacy, and for founding the renowned Sundance Film Festival, which has supported the work of independent filmmakers.

"Robert Redford. Your art stands the test of time. Your love of young filmmakers and artists gave us Sundance Film Festival," wrote actress Rita Wilson in an Instagram post. "You showed us the importance of nature. As a director, we were able to see your art from behind the camera. You will be remembered always. And you will be missed. May your memory be eternal."

Jamie Lee Curtis posted a photo of Redford as the "Sundance Kid" on social media with the simple caption: "A LIFE! FAMILY• ART• TRANSFORMATION • ADVOCACY• CREATION• LEGACY.

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