Buddy Duress, best known for starring opposite Robert Pattinson in the Safdie Brothers hit “Good Time,” has died … according to his brother.

Christopher Stathis confirmed the news to People Tuesday saying Buddy died back in November … a death Christopher attributes to cardiac arrest brought on by drugs.

Duress has several credits on IMDb including “Person to Person,” “The Great Darkened Days,” “Beware of Dog,” “Flinch,” “Funny Pages” and “Heaven Knows What.”

Buddy dealt with drug abuse and legal issues for much of his adult life it seems. He met director Josh Safdie after his release from NYC’s Rikers Island prison — where he did time for drug charges — and filmed his part in “Heaven Knows What.”

After that, he was rearrested for not going to rehab.

Josh and his brother Benny Safdie asked Buddy to journal his experiences in prison — which partly served as a basis for “Good Time” according to the Los Angeles Times.

It appears Buddy still has 2 more projects set to be released posthumously … “Mass State Lottery” and a short film called “Skull” should be coming out over the course of the next year.

He is survived by Christopher and his mother Jo-Anne.

Buddy was 38.