Sunset Boulevard/Corbis via Getty Images. Sylvester Stallone shared a pensive moment with Burt Young as the duo filmed 1990's Rocky V. Young played Rocky Balboa's righthand man, Paulie, in the ...

Sylvester Stallone based Rocky Balboa on real-life boxer Chuck Wepner, a little-known underdog who managed to last into the 15th round before losing to Muhammad Ali in 1975. Getty Images ...

Burt Young and Sylvester Stallone attend the "Rocky" Broadway opening night at The Winter Garden Theatre on March 13, 2014 in New York City. Bruce Glikas/FilmMagic/Getty Images, FILE.

Sylvester Stallone celebrated 27 years of ... "27 years with the love of my life," Sylvetser captioned the carousel of images featuring the couple cutting the ... Young Sheldon Alum Montana ...

Actors Sylvester Stallone and Burt Young attend the "Rocky" Broadway opening night at the Winter Garden Theatre on March 13, 2014 in New York City.Andrew H. Walker / Getty Images ...