Selome Hailu Paul Rudd has joined the cast of “Only Murders in the Building.”Hulu confirmed to Variety that he will star in the show’s third season after making a cameo as Broadway star Ben Glenroy in Season 2 finale “I Know Who Did It.” It has not yet been announced whether Rudd will appear in a series regular, recurring or guest capacity.“Paul Rudd, after making an auspicious entrance into the world of our show at the end of Season 2 as Ben Glenroy, is someone we clearly want to know more about and see in our upcoming Season 3 — as he is a clear source of many upcoming questions and, as ever with our show, many twists yet to come!” series co-creator John Hoffman said in a statement to Variety.