Rønne attended Viborg Katedralskole, graduating in 1997 to pursue a bachelor's degree in media studies from Aarhus University and a diploma in journalism.

In 2005, Rønne was offered the chance to replace Andrea Elisabeth Rudolph as co-presenter of TV 2's Vild med dans, but rejected the offer in order to pursue a journalistic career at Danmarks Radio (DR),[3] working for TV Avisen alongside Dagens Danmark on 1 January 2006, before joining the team behind DR1's Aftenshowet on 1 January 2007.

Having worked initially as a researcher and reporter, Rønne was appointed editor of the show on 1 August 2007, and first stood in for regular presenter Louise Wolff on 3 March 2008.

[8] DR announced on 4 February 2014 that Rønne would present the 2014 Contest in Copenhagen alongside Pilou Asbæk and Nikolaj Koppel.

In October 2015, she travelled to Lebanon with fellow ambassador Jesper Christensen to witness first-hand how the organisation helps Syrian refugees in the country.