Blake Heron has died at his Los Angeles home. The former child actor was 35.

TMZ said police suspect he died of an apparent illicit substance overdose days after he left rehab, however no illegal drugs were found at the scene.

First responders reportedly attempted to revive the actor with Narcan, but were unable to save him and he was pronounced dead.

TMZ said Heron had been sick this past week and flu medicine was recovered at his home.

The Wrap reported an autopsy is planned to determine the exact cause of his death.

Heron's credits include "Shiloh," "We Were Soldiers," "Tom and Huck" and "11:14."

He also was recently featured in a documentary called "A Thousand Junkies," which premiered at Tribeca Film Festival.