At a casting for Commissioner Rex in 1999, Rupp, who was almost twelve years old at the time, stood out and was hired for the episode Terrible Truth.

Afterwards, Rupp devoted himself to his school education and only occasionally appeared in front of the camera in small roles, including “Tom and the Beaver Gang” in 2001.

The Austrian soap opera Mitten im 8en, in which Rupp appeared in 2007, was cancelled after 56 episodes due to falling ratings.

Rupp co-directed the two-part thriller The Last Judgment in 2008 together with Tobias Moretti, whose son he played, directed by Urs Egger.

[4] For his role in the ORF-Landkrimi Vier he was nominated at the TV Film Festival Baden-Baden 2022 together with Manuel Rubey awarded the special prize for outstanding acting performance.