Sylvester Stallone is writing a tell-all memoir! Rocky actor, 77, will focus on ... trends now

Sylvester Stallone is writing a memoir.

The action star is penning The Steps, which is inspired by his famed Rocky character's running up the Philadelphia Museum of Art's stairs in the 1976 film's  training segment, Page Six shared on Friday.

The book will be like his good pal Arnold Schwarzenegger's tome Be Useful, it has been claimed.

The likely page turner is scheduled to hit bookshelves in 2025 from HarperCollins' imprint William Morrow.

The site added the book had an intense bidding war between publishing houses

'The Steps will offer readers not only riveting anecdotes from one of Hollywood's biggest stars, but also invaluable insights and practical wisdom that will inspire and resonate for generations to come,' a source told the site.

According to the publisher, 'Sly will delve deep, offering readers an intimate glimpse into his life journey for the very first time. 

'Since the release of Rocky in 1976, what has unfolded is an extraordinary love affair between Sly and the world, a unique bond that has lasted for over five decades and speaks to Sly's remarkable ability to uplift and motivate.'

Stallone made the museum's steps famous playing Rocky Balboa.

A statement about the book also said, 'The famous 72 steps in Philadelphia featured in the movie Rocky have become symbolic of resilience and determination, and have inspired countless individuals. 

'This memoir will represent the culmination of decades of reflection since 12-year-old Sly sat on those steps and daydreamed about being a hero.'

It was added: 'The real story is about facing, embracing, and ultimately overcoming life's challenges, step by step, and what we find when we do: hope, happiness, prideful humility, joy, and love.'

His other hit films include Rambo, Tango & Cash, The Expendables and Creed.

He is also on the reality TV show The Family Stallone, with his wife, Jennifer Flavin, and daughters, Sophia, Sistine and Scarlet.