Weller studied classical music composition at Brandeis University under Irving Fine, Harold Shapiro and Martin Boykin and earned his living as a jazz pianist before taking his graduate degree in theater at the University of Manchester, England.

His plays have been performed at major theatres in America and around the world. Best known are Moonchildren, Fishing, Loose Ends, Spoils of War, and What the Night is For, which had a production in the West End starring Gillian Anderson and Roger Allam. His films include Hair and Ragtime (for Milos Forman) and Lost Angels (for Hugh Hudson), and a television film based on his play Spoils of War.

He was a writer/producer on the acclaimed television series Once and Again, and is developing a series called Nassau County with director Michael Pressman.

Based on private mentoring over his career, he designed a developmental the acclaimed Mentor Project for of the Cherry Lane Theatre, and has served for ten years as it’s Supervising Mentor.

His play “Beast” was developed with the New York Stage and Film reading series in July 2008, and opened at the New York Theatre Workshop in September ’08, directed by Jo Bonney. A second new play of his, “50 Words” opened ten days later at the Lucille Lortel Theatre, starring Elizabeth Marvel, directed by Austin Pendleton. A musical based on the Boris Pasternak novel “Dr Zhivago,” for which he wrote the book (Des McAnuff to direct, Lucy Simon music, Amy Powers and Michael Korie lyrics), is scheduled to open in 2010, and he is currently working with Taylor Hackford on a musical (“Rumors”) about the making of Fleetwood Mac’s two legendary breakthrough albums.

His work has won an Academy Award nomination, an N.A.A.C.P. Outstanding Contribution Award, Critics Outer Circle Award, a Rockefeller Foundation Grant and a Kennedy Center Fund for New American Plays Award, and he has been honored by The Broken Watch Theatre Company, which names their playhouse in his honor. He is on the counsel of the Writer’s Guild of America Foundation, east, Inc, and serves as a mentor for their Iraqi War Veterans Writing Project. He is also on the board of the Dramatists Guild of America.

He has taught playwriting at the Toynbee School and Goldsmiths Teacher Training College in London, and at New York University, the Bay Area Playwright's Festival, the Kennedy Center Summer Playwriting Intensive and has also taught screenwriting at N.Y.U.