Nils Anders Mortensen was born in Flekkefjord in 1971. He began playing piano at age three, and in 1986 he won the Norwegian Young Pianist Competition. He studied at the Norwegian Academy of Music, École Normale in Paris, and Hochschule für Musik und Theater in Hannover with Einar Steen-Nøkleberg. Other important teachers have been Tatjana Nikolajeva and Hans Leygraf.
Mortensen was the recipient of the prestigious Concerts Norway ‘Debutant of the Year’ award in 1996. He has won international prizes and grants. In 1998 he won the Mozarteum Prize in Salzburg. In 2004 Mortensen received the Robert Levin Memorial Prize.
Mortensen has appeared as soloist with Norway’s leading orchestras. He recorded piano concertos of Geirr Tveitt with Stavanger Symphony Orchestra. His first solo album Im Freien (LWC1032), featuring music of Debussy, Grieg, and Bartók, was released in 2012 to glowing reviews.
Mortensen has also released eleven recordings with mezzo-soprano Marianne Beate Kielland on the LAWO Classics label: Früh (LWC1033), Sæle jolekveld (LWC1040), Grieg (LWC1059), Young Elling (LWC1072), The New Song (LWC1097), Whispering Mozart (LWC1111), Songs: Kielland/Dørumsgaard (LWC1145), Einsamkeit – Songs by Mahler (LWC1157), Eivind Groven Songs (LWC1178), Schumann Lieder (LWC1197) with baritone Johannes Weisser, and Så kort ein sommar menneska har – Songs by Gisle Kverndokk (LWC1220). In 2015 he released the solo recording In finstrer Mitternacht (LWC1084), featuring music of Brahms, and Tundra (LWC1092), a recording of solely Russian music, with double-bassist Knut Erik Sundquist. In 2016 he released Schumann: Violin Sonatas Op. 105 & Op. 121 (LWC1110) with violinist Arvid Engegård. In 2019 he released his third solo recording on the LAWO Classics label, Bach: Ouvertüre nach Französischer Art, BWV 831 / Sarabande con Partite, BWV 990 / Englische Suite Nr. 6 d-Moll, BWV 811 (LWC1174), and in 2020 he released Schumann: Piano Quintet, Op. 44 / Piano Quartet, Op. 47 (LWC1189) with the Engegård Quartet. His fourth solo recording, J.S. Bach: Partitas Nos. 1, 5 & 6 (LWC1249), was released in 2023.