AN autopsy has been carried out on Sylvester Stallone's son Sage after his death aged 36, but toxicology results will take about 10 weeks, officials say.

The Hollywood A-lister was said to be "devastated" after his eldest son, also an actor, was found dead at his Hollywood home on Friday, with some reports suggesting he had died from a drug overdose.

The autopsy took place on Sunday morning, said Los Angeles County Coroner's Office representative Cheryl MacWillie.

Some prescription pill bottles were taken from his apartment, but authorities have said little about the cause of the death. There was no sign of foul play or trauma, or a suicide note, said Ed Winter of the coroner's office.

Sage Moonblood Stallone appeared in the 1990 film Rocky V as Rocky Balboa Jr, the son of his father's title character. The pair also appeared together in the 1996 movie Daylight.

The 36-year-old is credited with 13 big-screen roles as an actor, while he was a producer on three films, including the 2006 short Vic which he also wrote and directed.

"He wasn't depressed. He was thinking about getting married. He just had his whole life ahead of him," Sage Stallone's lawyer George Braunstein told the Los Angeles Times.

His father was in San Diego at the annual Comic-Con festival to promote his latest movie Expendables 2 when he was told about his son's death.


Sylvester Stallone's publicist Michelle Bega issued a statement hours after the death was confirmed, saying the star "is devastated and grief-stricken over the sudden loss of his son, Sage Stallone."

"His compassion and thoughts are with Sage's mother, Sasha," the statement added, referring to the Rocky star's first wife. "Sage was a very talented and wonderful young man."