"Jersey Shore" star Vinny Guadagnino made his acting debut on MTV's "The Hard Times of RJ Berger" -- and while it may not earn him an Emmy, he did a good job teaching the title character about the GTL lifestyle!

Vin played Paul Iacono's character's cousin, also named Vinny, in last night's episode -- where he gave RJ a few tips on how to pick up the girl of his dreams.

We talked to Paul about having the reality star on set, and he said Vinny "could not have been more professional and really brought a lot of things to the character."

Check out his performance above -- think Vin should keep acting? Sound off below!

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