Tellervo Kalleinen (*1975 Lohja) and Oliver Kochta-Kalleinen, (*1971 Dresden) are an artist duo from Helsinki. In their practice they attempt to merge the languages and approaches of a number of disciplines, such as game design, experimental education, dynamic facilitation, social architecture and alternative economies.
Tellervo and Oliver are known as the founders of the International Complaints Choir project. Starting in 2005 in Birmingham the project went open source in 2006, creating a global phenomenon of joyful expression of collective frustration.
Tellervo's and Oliver's collaborative works were presented for example at P.S.1 and the Whitney Museum of American Art (New York), Mori Art Museum (Tokyo), Göteborgs Konsthall, Sparwasser HQ (Berlin), Signal Galleri (Malmö), Hamburger Kunsthalle, Momentum 06 (Norway), Singapore Biennale, Galerie für Landschaftskunst (Hamburg), MOCA Taipei, S.M.A.K. in Ghent, KUMU in Tallin and at ARS06 at the Finnish Museum of Contemporary Art KIASMA (Helsinki).