Stars including George Clooney, Ben Stiller and Meryl Streep have all posed for photos wearing a "magical" hat for a special book to raise funds for Kate Winslet's autism charity.
The Titanic actress is releasing the tome, named The Golden Hat, to boost money for the Golden Hat Foundation, which she set up to help her friend's son Keli, who suffers from the condition.
Celebrities including Ben Stiller, Anna Wintour, Jude Law, Christina Aguilera, Demi Moore and Elijah Wood have all posed for photos in the hat, and the images will be included in the book.
Each star has also written a special note about how they would attempt to communicate if they suffered from autism.
The book is to be released in April (12).