Billy Crystal and Whoopi Goldberg
In the wake of the shocking news of Robin Williams's death, there was an outpouring of love and support for the late actor. Many celebrities took to Twitter to express their deep sadness and broken hearts. His daughter, Zelda Williams, tweeted a heartbreaking message for her dad, along with a powerful quote. The rest of the world, meanwhile, has taken to celebrating his life with memories of his most-iconic roles and the most-powerful words from those characters. Although we're all mourning, these responses, coming from former costars and others who worked closely with Robin over the years, are especially moving.