Sean Penn has praised Matthew Perry’s courage in the way that he spoke out about his addiction in order to help others who are suffering. Appearing on Piers Morgan Uncensored on Wednesday (November 22), the Oscar-winning actor explained that while he did not know the late Friends star well, he admired the openness in the way that he handled his struggles. “I can’t claim to have known him well, but I liked him very much,” he said.