More Broadway stars have joined HBO's previously announced period drama The Gilded Age. Hadestown Tony nominee Patrick Page, Tony winner Bill Irwin and Tony nominee Douglas Sills are set to appear in the series, according to Deadline. Page and Sills will take on the recurring roles of loyal secretary Richard Clay and chef Monsieur Baudin, respectively. Irwin is set to guest star as a former beau of Cynthia Nixon's character Ada Brook.