Effective period / Period of releases: 1996 - 2016

Members: Paul O'Neill, Johnny Lee Middleton, Jon Oliva, Al Pitrelli, Jeff Plate, Chris Caffery, Robert Kinkel, Alex Skolnick, Angus Clark, Asha Mevlana, Mee Eun Kim, Jane Mangini, John O. Reilly, Luci Butler, Blas Elias, Darryl Pediford, Joel Hoekstra, Vitalij Kuprij, Derek Wieland, Roddy Chong, Bill Hudson (6), Dino Jelusić, David Zablidowsky, Robin Borneman, Nathan James (3)

Trans-Siberian Orchestra (often abbreviated as TSO) is an American progressive rock band that was founded by Paul O'Neill. Their albums and releases are usually centrally themed and have often focused on subjects like Christmas, winter, or grand human achievements. They are especially known for their touring and spectacular live concerts where they have now sold over 10 million tickets worldwide. In similar numbers, they have also sold over 10 million albums.