Sylvester Stallone films 'Rocky Balboa' 

Sylvester Stallone weighs in on the set of his movie "Rocky Balboa" in Las Vegas December 5, 2005.

"Rocky Balboa" is the next story in the saga of Philadelphia boxer Rocky Balboa, one of Hollywood's most beloved characters.

In the film, Rocky has long since retired but is drawn back to the boxing ring one last time. Stallone, 59, created the Rocky genre, writing and starring in the first movie in 1976.