Sly Stallone's son Sage dies Sage Stallone, the son of American actor Sylvester Stallone, has been found dead. The 36-year-old's body was found at his Hollywood apartment. Stallone Jr appeared in a number of films including the 1990 blockbuster Rocky V with his dad. Police have yet to reveal the cause of death but said there was no sign of forced entry or violence at his home. US showbiz website TMZ says Stallone died of an overdose of pills and that authorities are trying to determine if his death was intentional. The publicist for his father released a statement saying that Sly Stallone was "devastated and grief-stricken" at the news. Sage was the younger of two sons from his father's first marriage. More about: Cinema, Death, Hollywood, Los Angeles