Semi Chellas is a writer and co-executive producer for the acclaimed television series Mad Men. The Emmy-nominated writer studied English at Cornell as a Mellon fellow, and on March 10 will be returning to campus to speak at Klarman Hall. In anticipation of her lecture, “Telling Secrets: Notes from the Writers’ Room,” the Sun had a chance to speak with Chellas about her experiences writing for Mad Men and her opinions on the television industry in general. The Sun: What are the day-to-day operations like working in the writers’ room? Semi Chellas: There were about 10 to 12 people in the writing room, including two advertising people — i.e. not advertisers for the show but people who worked in advertising — [including] one that worked in advertising in the 60s.