Max Bogner is a musician, dancer and performance artist originating from Vienna currently living and working in Berlin. He has been playing under different monikers (Margaret Unknown, Margaret X, MARARA, Peggy Famous).

Over the past decade he founded and lead several groups like the ensemble (In) The Abyssity Of The Grounds with Mario Rechtern (DE/AT), Linda Sharrock (US) and Didi Kern (AT) amongst a constantly shifting international line-up and the two piece performance group Gueule Populaire, focusing on the combination of sound and movement with longtime collaborator Rosi Themsen Rehaug (H/AT), influencing and contributing to the Viennese improv scene as well as being an active player in Europe and Africa.