Career
After the election in 2013, Astrup was appointed as vice-chair of the Conservative Party Parliamentary Group. Prior to his election to parliament, he worked as political adviser for the Conservative Party parliamentary group and political adviser to the Governing Mayor of Oslo. Between 2001 and 2008 he was the editor of the conservative periodical Minerva.
Ahead of the 2009 election for parliament, Astrup was nominated as the Conservative Party"s fourth candidate for Oslo, considered the last safe seat.
He defeated Inge Lønning in the nomination. Ahead of the election in 2013 he was nominated as the second candidate for Oslo, behind the Minister of Defence, Ine Eriksen Søreide.
In parliament, Astrup sat on the Standing Committee on Energy and the Environment from 2009-2015, and from 2016 he is the leader of the Standing Committee on Transport and Communication and is the Conservative"s spokesperson on issues relating to these issues. Foreign a number of years Astrup was also spokesperson on European affairs and he served as vice-president of the European Movement in Norway in 2012-2013.
In March 2011, he was named the "European of the Year" by the JEF Norway.