For more details on the reported circumstances surrounding Hoffman's death, click here.
Joel McHale, Rainn Wilson, Steve Martin and Aaron Paul were among some of the actors who Tweeted this afternoon, among others...
Shocked to hear of Phillip Seymour Hoffman’s death. If you missed him as Willy Loman, you missed a Willy Loman for all time.— Steve Martin (@SteveMartinToGo) February 2, 2014
We lost one of the greats today. Philip Seymour Hoffman RIP my friend. You will be missed always and forever.— Aaron Paul (@aaronpaul_8) February 2, 2014
Rest in peace Philip Seymour Hoffman. You were one of the best. You're gone way too soon. #RIPPhilipSeymourHoffman— Joel McHale (@joelmchale) February 2, 2014
Rest in peace Philip Seymour Hoffman. We who marveled at each of your performances, are grateful and very very sad. http://t.co/XcbJG6CAUY— mia farrow (@MiaFarrow) February 2, 2014
R.I.P. Philip Seymour Hoffman. One of the greatest, kindest actors who ever lived.— RainnWilson (@rainnwilson) February 2, 2014
I'm so sad 2 read about Philip Seymour Hoffman Obviously, prayers 4 his family & friends. He was a Pure Actor and I will miss his talent— Sean Astin (@SeanAstin) February 2, 2014
Shocked and saddened at the news of the passing of Philip Seymour Hoffman. An incredible talent, and an incredible person. RIP— MichaelRaymond-James (@MRaymondJames) February 2, 2014
I have no words for the death of Philip Seymour Hoffman. One of the greatest ever is gone. One of my idols. I am beside myself. RIP PSH— David Anders (@QuestionAnders) February 2, 2014
"I wish that I’d sail the darkened seas On a great big clipper ship.." RIP Philip Seymour Hoffman. A great artist.— Anthony Bourdain (@Bourdain) February 2, 2014
Losing Phil Hoffman is an unspeakable tragedy. There aren't words. All our hearts are with his family and children. It's just utterly, no.— Martha Plimpton (@MarthaPlimpton) February 2, 2014
Phil was an irreplaceable force in American theater. His work & passion & intelligence & dedication were unmatched. It's just devastating.— Martha Plimpton (@MarthaPlimpton) February 2, 2014
Addiction is real. It is a real & vicious disease. It rips beauty from the world. Please, if you suffer, ask for help. You're not alone.— Martha Plimpton (@MarthaPlimpton) February 2, 2014
Philip Seymour Hoffman was such a great gift to the world. I am silenced to tears.— Dane DeHaan (@danedehaan) February 2, 2014
Deepest sympathies to Philip Seymour Hoffman’s family/friends. Awful news. He was already a legend in his short life. http://t.co/iJptiKMfyc— Chris Hardwick (@nerdist) February 2, 2014
Beyond shocked and saddened to hear about Philip Seymour Hoffman's death. Such an amazing talent that will be painfully missed.— Zachary Levi (@ZacharyLevi) February 2, 2014
Yeah,it's a bad bad disease. That's where it lands.. Staying close in my sober shoes.so fucking sad!— Katey Sagal (@KateySagal) February 2, 2014
"So fucking sad" pretty much sums it up, but Wil Wheaton's reaction is also pretty succinct...
goddammit.— Wil Wheaton (@wilw) February 2, 2014
Author Isaac Marion spoke about the evolution of Hoffman's career...
Philip Seymour Hoffman overcame early typecasting as The Prick and created some of the most complex and moving characters on film. RIP Caden— Isaac Marion (@isaacinspace) February 2, 2014
Such shocking & sad news. RIP Philip Seymour Hoffman. One of the greatest actors of a generation and a sweet, funny & humble man.— Ricky Gervais (@rickygervais) February 2, 2014
My heart is broken, my mind is racing. My idol has died and I am so confused and sad by this tragic loss. RIP #philipseymourhoffman— Josh Gad (@joshgad) February 2, 2014
We'll continue to add more as they come in. Our thoughts and prayers go out to Hoffman's friends and family in their time of loss.