Robin Williams
Robin Williams during a stand-up show. Photograph by Arthur Grace. Image courtesy of Sotheby’s.

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The lots will include memorabilia such as a pair of Muhammed Ali’s boxing gloves, a baseball signed by sportsman Yogi Berra and a basketball shirt signed by star Lebron James. Objects from his film career include a Golden Globe award for Good Morning Vietnam and a dagger prop from Hook.

Artworks in the auction include Banksy’s Happy Choppers and a number of his watches, books and toys.

Marsha Garces Williams said: “We chose things that made us laugh, think, or want to be its caretakers for a period of time.”

Some of the proceeds from the auction, to be held on October 4, will go to charities supported by Williams including Human Rights Watch and the Christopher and Dana Reeve Foundation. The family also hope to establish a permanent Robin Williams Scholarship Fund at The Juilliard School in New York with some of the earnings from the sale.

The collection will be on view ahead of the sale at an exhibition at Sotheby’s in Los Angeles on September 11-14 and in New York from September 29-October 3.