Lars Petter Hagen (born in Ski outside Oslo 02.08.1975) studied composition at the Norwegian Academy of Music in Oslo.
His music has been performed at festivals like Donaueschinger Musiktage, Maerzmusik, Eclat, and Gaudeamus Music Week by ensembles such as Ensemble Modern, SWR Sinfonieorchester Baden- Baden, Neue Vocalsolisten Stuttgart and Oslo Philharmonic Orchestra. In addition to vocal and instrumental music he works with sound installations and music for stage and film.
In 2003 Hagen was awarded the Arne Nordheim Composers Prize, and in 2004 he won the Edvard Prize, (Norwegian Work of the Year prize from the Norwegian Performing Rights Society) in the contemporary music category.
Lars Petter Hagen has been the artistic leader of Ny Musikk (Norwegian Section of ISCM), and the festivals Happy Days, Nordic Music Days and the Ultima festival in Oslo.