Movies:
* The World of Tomorrow (2015) - This is his most notable movie role, playing the character of "The Father".
* The Last Day (2019) - He played the role of "The Father".
* The White Woman (2022) - He portrayed the character of "The Doctor".
Television Shows:
* Rupel (2018) - He appeared in the show's 3rd season, playing the role of "Professor Van der Linden".
* Professor T. (2021) - Heyn has a recurring role as "Dr. Herman Van den Bossche", the father of the titular character. This show is an adaptation of a Belgian series and has aired internationally.
* Wolven (2023) - He appears in this series as "The Father".
Other projects:
* Heyn has also had roles in several short films, including "The Last One" (2016) and "The End" (2017).
* He has been involved in theater productions throughout his career, including works by Shakespeare and Molière.
It's worth noting that this list may not be exhaustive. There may be other projects that Heyn has been involved in, particularly those with limited distribution or regional release.