Rocky Easter Egg - Stallone Includes His Family Members

Sylvester Slallone, writer of all five Rocky movies and director of three of them, gives his personal family members roles in his movies.
In the original movie, Sly's brother, Frank, is the lead vocalist of the street singers, found throughout the movie. Also in the original Rocky, Sly's father plays the time-keeper/bell-ringer in the final fight with Creed.
In Rocky IV, Brigitte Nielsen playes Drago's wife. At the time of filming, Nielsen was Stallone's wife.
In Rocky V, Sly's off-screen son, Sage, playes the role of Rocky's on-screen son.