Diewertje followed her training at the Dutch Academy of Performing Arts and graduated from the Academy for Drama & Contemporary Music Theater in Amsterdam in 2015.
She has performed in plays such as De Revisor and As you like it from The National Theater and Emilia Galotti from International Theater Amsterdam. She starred as ‘Julia’ in the play Romeo & Julia by theater group Oostpool, 3 Zusters by Eline Arbo and Apocalypse by Nita Kersten, The opera Dappere Soldaat by Steef de Jong and the production Let’s Talk about Sex, directed by Noël Fischer from HNTjong.
Alongside theater, Diewertje appears regularly in the series Het Klokhuis, as well as the series and feature film Mees Kees. In 2018 she landed her first leading role in the film Superjuffie.
A more recent project that featured Diewertje is the series Dag & Nacht, directed by Joram Lürsen.