told The Guardian.“He died peacefully at home with his wife Polly and sons Frank and Noah by his side,” the agent said, confirming he had “been suffering from a brain tumor.”Ritter was initially known as a stage actor, and was nominated for an Olivier award in 2006 for “Coram Boy” and a Tony for his 2009 starring role in “The Norman Conquests,” The Guardian said.He also appeared in a number of high-profile movies, playing Eldred Worple in “Harry Potter and the Half-Blood Prince” and government