Sage Stallone Dead : Sylvester Stallone's Son Died at 36

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Sage Stallone, son of actor Sylvester Stallone, has been found dead, The New York Post and TMZ report .

The junior Stallone was reportedly found at home in Los Angeles. TMZ reports that his father is extremely distraught. The Post spoke with Sage Moonblood Stallone's attorney, who said the death came as a complete shock.

"He was in good spirits, and working on all kinds of projects," George Braunstein told the paper. "He was planning on getting married. I am just devastated. He was an extremely wonderful, loving guy. This is a tragedy."

TMZ's sources said the cause of death was a prescription overdose .

The Post reports that his mother, Sasha Czack, had also been notified of her son's passing. Stallone made his acting debut alongside his father in "Rocky V." He he went on to act in a number of films, most recently in "Promises Written in Water" in 2010 (he also appeared in "The Agent," a short, and in a 2011 television documentary episode on the Rocky films).

Sylvester Stallone was in San Diego Thursday to promote "Expendables 2," his new film with Arnold Schwarzenegger. The actors spoke on a panel in Hall H at Comic-Con.

UPDATE: 5:15 PM PT:

Sylvester Stallone's rep, Michelle Bega, tells TMZ, "Sylvester Stallone is devastated and grief-stricken over the sudden loss of his son Sage Stallone. His compassion and thoughts are with Sage's mother, Sasha. Sage was a very talented and wonderful young man. His loss will be felt forever."

Sage Stallone-- Sylvester Stallone's son -- has died and sources tell us the cause was an overdose of pills.


The details surrounding the death are still unclear .. but we're told he was found in his L.A. apartment by either a maid or his girlfriend. Paramedics were called to the home and pronounced him dead at the scene.


Sources tell us authorities are trying to determine if the death was intentional or accidental.


We're told Sylvester is a "wreck."


Sage famously made his film debut alongside his father in the 1990 movie "Rocky 5" -- playing the role of Rocky's son Robert Balboa.


He went on to act and direct in several films ... including the 1996 film "Daylight."

Sage's mother is Sasha Czack.