Can you believe Sylvester Stallone first became a Hollywood knockout all the way back in 1976? We certainly can't!
Click through the gallery to see the cast of Rocky then and now!
After his lead role in Rocky, Sylvester, 70, went on to have a long and successful acting career appearing in 1993's Cliffhanger, The Expendables franchise and five more Rocky films. He most recently reprised his role as Rocky in the 2015 movie, Creed.