ET looks back at Sylvester Stallone through the years in rare interviews, from his big break in 'Rocky' to becoming an action movie icon. | Entertainment Tonight

Sylvester Stallone and Gayle King watch “Rocky” together to break down the iconic training montage. https://cbsn.ws/3KQBuC1 | CBS Mornings

Sylvester Stallone's beloved underdog hero, Rocky Balboa, hails from Philadelphia (better known as the City of Brotherly Love). That's a concept that Sly is very familiar with, because when he started making movies, he invited his brother Frank along with him. Frank paid tribute to his big brother at the 48th Kennedy Center Honors, performing "Take You Back" (the street corner song he wrote and sang for the iconic 1976 film 𝘙𝘰𝘤𝘬𝘺). Watch more of this incredible moment on December 23 at 8 p.

🇺🇸 WATCH🇺🇸 The 48th Kennedy Center Honors was filled to the brim with memorable moments celebrating our star-studded class of Sylvester Stallone, Gloria Gaynor, Michael Crawford, George Strait, and KISS. We’ve highlighted just a few excerpts from that iconic weekend and invite you to enjoy the full experience on CBS and Paramount on Tuesday, December 23, at 8 p.m. ET/PT. | The Kennedy Center