Updated On: 20 September, 2023 03:27 PM IST | Los Angeles | IANS
Sly penned the screenplay for `Rocky` in just three days but was disappointed that Hollywood executives showed little interest in the project at first

Sylvester Stallone. Pic/AFP
Hollywood icon Sylvester Stallone just penned about "what (he) knew" when making `Rocky`.
The 77-year-old star wrote the script for the 1976 film -- which spawned the iconic franchise featuring Sly as Philadelphia boxer Rocky Balboa -- and used his own life as inspiration during his initial ideas for the character, reports aceshowbiz.com.