Philip Seymour Hoffman’s death Sunday was shocking to his fans and to those who knew him and worked with him. Celebrities from Steve Martin to his Hunger Games: Catching Fire co-star Sam Claflin took to Twitter and other social media to share their memories of the late actor.

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“What a devastating loss,” Nicole Kidman told EW in a statement. “He was one of the greatest actor’s actor of all time. He’d take your breath away, he was so talented. My thoughts and blessings are with Philip Seymour Hoffman’s family.”

“I feel so fortunate to have known and worked with the extraordinary Philip Seymour Hoffman, and am deeply saddened by his passing,” Julianne Moore — who worked with Hoffman in Boogie Nights, Magnolia, and The Big Lebowski — told EW in a statement. “My thoughts and condolences are with his family.”

“There are no words,” George Clooney said in a statement to EW. “It’s just terrible.”

“This is a horrible day for those who worked ‎with Philip. He was a giant talent,” Tom Hanks said in a statement to EW. “Our hearts are open for his family.”