Sylvester Stallone has done a ton of films since he started appearing in them back in 1969. But we all know the one film that stands out above them all. “Rocky” and it just turned 43 years old. Stallone took to Instagram to celebrate the film’s birthday and he showed appreciation to the fans who supported the film over the years. “Nov 21, 1976: On this day 43 years ago #ROCKY was born. Thank you for all the great moments and support. YO, #KEEPPUNCHING!” Stallone wrote. Fans continue to show their love and support on the film by commenting on the post.