James Caan's cause of death confirmed by Los Angeles County coroner
Caan, best known for his Oscar-nominated turn as Sonny Corleone in 1972's The Godfather, died on July 6 at 82.
The veteran performer also played standout roles in 1982's Kiss Me Goodbye, 1975's Funny Lady, 1990's Misery, and 2003's Elf.
Caan's death was confirmed "with great sadness" by his family July 7 on Twitter.
In a statement to the Los Angeles Times, Caan's publicist said his "family appreciates the outpouring of condolences from his friends and fans from around the world, and respectfully request privacy in this time of great mourning."
"No further details will be released at this time."
Tributes pour in for James Caan
Shortly after his death, Caan was remembered fondly by his Godfather co-stars and director Francis Ford Coppola, who called his collaborator "one of the funniest people" he's ever known.
"Jimmy was someone who stretched through my life longer and closer than any motion picture figure I've ever known," Coppola said in a statement. "From those earlier times working together on 'The Rain People' and throughout all the milestones of my life, his films and the many great roles he played will never be forgotten."
"Jimmy was my fictional brother and my lifelong friend," said Al Pacino, who played Michael Corleone in the Godfather films. "It's hard to believe that he won't be in the world anymore because he was so alive and daring. A great actor, a brilliant director and my dear friend. I loved him, gonna miss him."
Cover photo: Chris Delmas / AFP