Almost all of us have been fortunate enough to see Robin Williams’ talents unfold onscreen, but only a select group of people got to experience the magic of working with him. The late actor’s co-stars are understandably heartbroken about his tragic death. Sally Fields, who acted opposite Williams in 1993’s Mrs. Doubtfire , said in a statement she was “stunned and so sad about Robin,” adding, “I’m sad for the world of comedy. And so very sad for his family. And I’m sad for Robin. He always lit up when he was able to make people laugh, and he made them laugh his whole life long….tirelessly.” Minnie Driver, who worked with Williams in 1997’s Good Will Hunting, took to Twitter to express her grief writing, “My Heart’s broken. Robin was a beautiful, kind soul. Can’t bear that he’s gone. So incredibly sorry for his family.” More co-stars and celeb pals weighed in with heavy hearts, too, like Chevy Chase.