In 2009, Mönning was a jury-member at the Sitges Film Festival in Spain.
Mönning studied acting from 1999 until 2002 at the Schauspiel München actors' studio.
Apart from her television- and film-work, she also appeared on several German and other European stages and toured the US with a musical.
Her first television-role was in the 2003 crime-series Die Wache on RTL. This was followed by a string of other supporting- and leading-roles on German television.
On 27 April 2023, Mönnings' book "Nicht normal" ist ganz normal was published.