Tarjei is the same age and attends the same school as his character on Skam.
Tarjei is the one of the dancers in Madcon's music video "Don't Worry".
In 2018, he played Doody in the Norwegian production of the musical Grease. His first musical and dancing part on stage which landed him great reviews.
He skipped math to audition for Skam, which was his first attempt at acting.