(SeeEW’s special tribute cover featuring Boseman.)

“This is beyond heartbreaking,” Chris Evans tweeted on Friday night.

“Chadwick was special.

He was a deeply committed and constantly curious artist.

He had so much amazing work still left to create.

Im endlessly grateful for our friendship.

Rest in power, King.”

Brie Larson called Boseman “someone who radiated power and peace.

Who stood for so much more than himself … You will be missed and never forgotten.”

He was our TChalla, our Black Panther, and our dear friend.

He was as smart and kind and powerful and strong as any person he portrayed.

Now he takes his place alongside them as an icon for the ages.

The Marvel Studios family deeply mourns his loss, and we are grieving tonight with his family.

God bless Chadwick Boseman."

Issa Rae simply tweeted, This broke me.

See below for more tributes to Boseman.