The creator and writer of "Downton Abbey," Julian Fellowes, will be writing a new costume drama based on a Trollope novel, returning to the British network ITV. The success of "Downton Abbey" continues to translate into more opportunities for the writer.

Fellowes will be adapting British author Anthony Trollope's novel, "Doctor Thorne," into a three-part miniseries for ITV, according to Deadline. The adaptation will begin filming later this year, meaning Fellowes will either further postpone his NBC period series "The Gilded Age" or will work on both projects simultaneously.

"As a lifetime devotee of Trollope, my own favorite among the great nineteenth century English novelists and certainly the strongest influence over my work that I am conscious of, it is tremendously exciting and satisfying to know that my adaptation of one of his best-loved novels is coming to ITV. I could not be more delighted," Fellowes said.

The novel focuses on Dr. Thomas Thorne and his niece Mary, who has many advantages except a large income. However, she falls in love with Frank Gresham, the only son of the well-to-do Gresham family. He falls in love with her as well, but as their family descends into financial instability his mother makes her mission to drive them apart and marry him off to a wealthy family.

The drama will be produced by Hat Trick Productions and Mark Redhead will be executive producer alongside Julian Fellowes, Chris Kelly and Ted Childs. ITV has yet to announce the miniseries' release date but the network looks forward to Fellowes' adaptation.

"It's a rich and multilayered story of class and social standing and a timeless love story which Julian has brought to life brilliantly with his inimitable wit and warmth," ITV's director of drama Steve November said, according to Variety.

While he is working on the Trollope adaptation, Fellowes will also continue working on "The Gilded Age," which will air on NBC sometime in the future. Fellowes, however, first wants to finish "Downton Abbey."