Robert’s dad introduced him to smoking cannabis when he was only six — the elder Downey had caught him with a glass of wine.

From then on, the actor became familiar with doing more drugs, watching X-rated films, and appearing in his father’s bizarre projects.

His first role was as a stray dog waiting to be put down in the 1970 film, “Pound.”

He appeared alongside his mother in another film two years later— this time as a child whose throat gets cut.

His parents got a divorce and he moved away with his dad, returning to New York after his dad cut him off financially.

The actor faced several setbacks including legal troubles until he met his wife in 2003.

Robert honored his dad after he died in his sleep at his NYC home in 2021.

The actor shared a throwback image of the late filmmaker, eulogizing him as a “true maverick filmmaker.”

Downey Sr. had suffered Parkinson’s disease until his death at 85.