Comedienne and former talk-show queen Rosie O'Donnell is joining that other honey-voiced entertainer, Harvey Fierstein, in Broadway's Fiddler on the Roof, beginning Sept. 20. O'Donnell, whose previous stage performance credits include Grease and Seussical: The Musical, will play wife to Fierstein's Tevye, marking the first time that Golde has ever maintained a blog.