Actor Sylvester Stallone is planning to bring his own life story to the big screen, says his mother.

The "Rocky" star is focused on making a movie about his upbringing and lengthy career in Hollywood, reports contactmusic.com.

"Sylvester is doing the story of his life, his own biography. He's got 'Rambo V' to film and he'll be going to Budapest to begin the 'Expendables 4' - so he's filming his biopic in between," his mother Jackie was quoted by The Sun newspaper as saying.

The 68-year-old, who has been in Hollywood for over four decades, is best known for doing action movies like the "Rocky" and "Rambo" series. He has even directed movies like "Rocky II", "Rocky III" and "Rocky IV".