As news of the death of boxing legend Muhammad Ali spread Friday night, celebrities, filmmakers and athletes were among the many people paying tribute to the champion on social media.

“We will never forget your courage, standing up to those in power,” wrote filmmaker Michael Moore.

“So long great one,” wrote fellow boxer Mike Tyson.

ABC’s Ben Sherwood quoted his thoughts on achieving the seemingly impossible:

Edgar Wright, Lionel Richie and Holly Robinson Peete also weighed in:

“Always the champ,” proclaimed Patricia Arquette.

“Everybody Loves Raymond” creator Phil Rosenthal reminded that he was called “The G.O.A.T.” — the Greatest of All Time.

“Fly like a butterfly,” said actor Josh Gad.