Mads Sjøgård Pettersen (born 21 January 1984) is a Norwegian actor known for his role of Fredrik Kayser on mini-series The Heavy Water War and for his portrayal of Håvard Bakkeli on the series Nobel.^[1]

In 2009 he portrayed Thomas in the film North (in Norwegian: Nord). In 2012 he was part of the cast of the mini-series Erobreren where he portrayed young Axel. In 2015 he played the role of Fredrik Kayser, a resistance member, in The Heavy Water War (in Norwegian: "Kampen om tungtvannet"). In 2016 he portrayed Håvard Bakkeli in Nobel. In 2017 he portrayed Per in the film Askeladden - I Dovregubbens Hall.^[2]