Photo Credit: Getty Images

It was very sad to hear the news about the passing of Robin Williams last night. He was known to be a nice guy, a good father and an incredibly talented actor that made us all laugh for decades. Theories for what caused his alleged suicide range from substance abuse, depression and massive debt. While we'll never know exactly what pushed him to end his life, we can celebrate him as a great man and amazing talent. Below are some highlights of his work and the reaction from other celebrities that were touched by his work and life. RIP Robin!