In an e-mail sent to colleagues Jan. 6, McCollum and Seller jointly announced plans to end their producing partnership that began with The Booking Office 21 years ago. Both partners will continue to work together on their existing businesses, but will move forward independently on future producing projects.

For the time being, the two will maintain their midtown office.

The e-mail reads, "What started as a couple guys in a room with two phones, two desks, one fax machine and one plant, led to a wonderful producing partnership. We are proud of all that we accomplished together, including three original Tony Award Winning Best Musicals. With the support and collaboration of many of you, we have shared triumphs and successes, challenges and disappointments. And we’ve had a lot of fun along the way."

McCollum and Seller earned Tony Awards for Rent, Avenue Q and In the Heights, all of which began life in smaller Off-Broadway runs prior to their hit Broadway and international status. All three of the musicals earned Tony Awards for Best Musical and Best Score.

Additionally, the producers helped usher West Side Story back to Broadway in 2008, under the direction of original Tony-winning book writer Arthur Laurents. Their projects also include [title of show], Bengal Tiger at the Baghdad Zoo, White Christmas, High Fidelity, La Boheme, Private Lives, What's Wrong With This Picutre? and Anna Deveare Smith's Twilight: Los Angeles, 1992. In summer 2011, Seller and McCollum brought Rent back to New York in an Off-Broadway run at New World Stages, where it continues. They also produced the long-running Off-Broadway hit De La Guarda.