Nolan himself is famously anti-streaming and pro-theatrical. He has called piracy “a form of disrespect” to the hundreds of people who pour years into a film.
While many search for this title on third-party sites like Filmyzilla, it is officially available for streaming or purchase on several legitimate platforms: interstellar filmyzilla
In short:
The answer to “Can I download Interstellar from Filmyzilla?” is always no – legally, ethically, and practically. Choose cinema. Choose quality. Choose to support the art that moves us through space and time. Nolan himself is famously anti-streaming and pro-theatrical