Hoffman’s family called the news “tragic and sudden.” Hoffman is survived by his partner of 15 years, Mimi O’Donnell, and their three children.
“We are devastated by the loss of our beloved Phil and appreciate the outpouring of love and support we have received from everyone,” the family said in a statement.
Tributes poured in from other Hollywood figures.
“Damn, We Lost Another Great Artist,” Spike Lee, who directed him in “25th Hour,” said on Twitter.
Kevin Costner said in an AP interview: “Philip was a very important actor and really takes his place among the real great actors. It’s a shame. Who knows what he would have been able to do? But we’re left with the legacy of the work he’s done and it all speaks for itself.”
Hoffman was a spoiled prep school student in one of his earliest movies, “Scent of a Woman” in 1992. One of his breakthrough roles came as a gay member of a porno film crew in “Boogie Nights,” one of several films directed by Paul Thomas Anderson that he would eventually appear in.
He played comic, slightly off-kilter characters in movies like “Along Came Polly,” ‘‘The Big Lebowski” and “Almost Famous.” And in “Moneyball,” he was Art Howe, the grumpy manager of the Oakland Athletics who resisted new thinking about baseball talent.
He was nominated for the 2013 Academy Award for best supporting actor for his role in “The Master” as the charismatic, controlling leader of a religious movement. The film, inspired in part by the life of Scientology founder L. Ron Hubbard, reunited the actor with Anderson.
He also received a 2009 best-supporting nomination for “Doubt,” as a priest who comes under suspicion because of his relationship with a boy, and another best-supporting nomination as a CIA officer in “Charlie Wilson’s War.”