We were saddened to hear of the death of comedy legend Joan Rivers today, and we weren't the only ones. The 81-year-old Fashion Police host touched the lives of many during her nearly six-decade career, as evidenced by the torrent of support pouring out to the entertainer on social media — including from her co-stars.

Whether they worked with her directly, met her in passing, or even were just on the receiving end of her biting wit, Joan's entertainment world colleagues have been doing some serious mourning, from Bethenny Frankel to Joan's longtime friend Kathy Griffin to members of the Kardashian clan — plus basically the entire comedy universe.

We heard the crushing announcement from Joan's daughter, Melissa Rivers, earlier today, September 4. “It is with great sadness that I announce the death of my mother, Joan Rivers,” said a statement from the family. “She passed peacefully at 1:17pm surrounded by family and close friends ... My mother’s greatest joy in life was to make people laugh. Although that is difficult to do right now, I know her final wish would be that we return to laughing soon.”


Credit: NDN Photo: Stars React to the Passing of Joan Rivers (VIDEO)