After fifty years in the public eye, Sylvester Stallone is writing a memoir. The Steps has been acquired by William Morrow, a HarperCollins imprint, following what sources describe as a heated auction at the London Book Fair. The deal closed at around a seven-figure sum. The book will be published in September 2026.

The title refers to the 72 steps outside the Philadelphia Museum of Art – the steps Rocky runs up in the original film’s training montage, which have since become one of the most recognised locations in cinema. Stallone has described the double meaning: Philadelphia and the physical act of climbing, but also the idea of writing a book that could genuinely help people. Think Matthew McConaughey’s Greenlights in scope – part memoir, part lessons drawn from a life built from almost nothing.

 

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The Steps follows Sly, the Netflix documentary that provided a glimpse into his life and career. But this is expected to go considerably further – Stallone has always kept significant parts of his personal history private, and this book looks set to change that.