From rapping baddie to pop-punk cutie, M achine Gun Kelly has evolved right before our eyes ... and now, he's adding another layer to his ever-evolving persona -- college professor!

That's right -- the "Cliché" hitmaker headed to Harvard University this week to give a lucky business school class a lecture. He shared several pics of his visit on Insta, joking that "harvard has a new professor" in his caption. Gallery Launch Gallery

It's not clear what he taught -- the business of the music industry might be a good guess -- but he certainly looked the part, looking dapper in gray trousers and a plaid dress shirt. He layered his smart 'fit with a brown leather jacket and accessorized with a bedazzled silver necklace and a maroon and gold tie with Harvard's logo. Oh, and you can

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