While there have been rumors and discussions about potential sequels, no official plans or announcements have been made.
If you are interested in acting and would like to keep an eye out for potential casting calls for a Narnia film, it's best to keep an eye on industry news and websites such as:
* Deadline: https://deadline.com/
* Variety: https://variety.com/
* The Hollywood Reporter: https://www.hollywoodreporter.com/
* IMDb Pro: https://pro.imdb.com/
* Backstage: https://www.backstage.com/
Remember, it's important to be cautious of unofficial sources and casting calls, and to only submit materials to legitimate and verified sources.