What movie was Johnny first credit?

Please clarify who you mean by "Johnny". There are many actors and actresses named Johnny.

To help me identify the correct person, please provide more information, such as:

* Johnny's full name (e.g., Johnny Depp, Johnny Galecki, etc.)

* His profession (e.g., actor, musician, etc.)

Once you provide more details, I can help you find his first credited movie.