Wilder died on Sunday and Ostrum admits he's still recovering from the shock of his old friend's death, reported Variety.
"It's kind of like losing a parent. You know it's going to happen, but it's still a shock. He was not in good health at the end and it was not unexpected by any means, but when it happens, it hits you like, 'Gene is gone and there will never be anyone like him again'," the 58-year-old actor said.
He also recalled, "He was so quirky. You never knew what to expect from Gene. He never let on how he was going to read a line or convey an expression. That's why the film works, because he made Wonka so unpredictable.
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