There is no documented source for this short declaration, and it circulates as a standalone voice meme rather than a line from a well-known film or show. Its appeal comes from its simplicity: anyone marking a twentieth birthday, an age reveal or a coming-of-age joke can use the same proud announcement without needing extra context. Because the clip is only about two seconds long, it is easy to reuse in short-form videos, reaction edits and birthday compilations, where a single confident line can carry the whole joke. That flexibility is why it keeps appearing in new edits.