I’m so unprofessional on set it’s not even funny.

Taken at face value, McPhee is using self-deprecating humor to puncture the expectation that performers must always be poised and “serious” at work. Calling herself “unprofessional” can signal a playful, loose atmosphere on set—improvising, joking, or breaking character—rather than literal incompetence. The phrase “it’s not even funny” adds an ironic twist: she is describing behavior that is, in practice, probably very funny to colleagues, while exaggerating it as a flaw. In a celebrity-interview context, the line functions as a candid, relatable admission that humanizes a public figure and reframes professionalism as something that can coexist with spontaneity and levity.