Here's what we know:
* Filmmaker: He has worked on several short films, both as director and producer. You can find some of these on his Vimeo page.
* Acting: There's limited information on his acting roles. It seems he's mainly known for his work behind the camera, and it's possible his acting experience is mostly in short films or student productions.
To find more information, you could try:
* Searching for Leif Gantvoort on IMDb: IMDb is a comprehensive database of film and TV credits, but his acting credits might not be listed if he's only been in smaller projects.
* Contacting Leif Gantvoort directly: You could reach out to him through his website or social media if you have a specific question about his acting career.
Please note that his acting roles might not be widely known, and it's likely that his main focus has been on filmmaking.