Welcome to America, Julian Fellowes. The celebrated costume-drama-wunderkind (otherwise known as the creator of Downton Abbey) is developing a period drama for NBC tilted The Gilded Age. Fellowes has signed on to write and produce the series, which will chronicle the soapy lives of millionaires living in 1880s New York. In addition to Downton, which will premiere its third season on PBS in January and was just renewed for a fourth, Fellowes has also been busy penning the screenplay for the upcoming adaptation of Romeo and Juliet. We can already hear the music swelling.