No, this is NOT a throwback picture!

Vinny Guadagnino posted an Instagram snap with his former costars Ronnie Ortiz-Magro and Sammi "Sweetheart" Giancola — making it a mini-Jersey Shore reunion.

“Rahnn Stahppp[sic],” Vinny captioned a picture of the group, referencing Sammi’s pronunciation of her (ex?) boyfriend's name.

RELATED: 'Jersey Shore' Star Snooki Heads Back to Her "Old Stomping Grounds" — See the Pics!

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Rahnn Stahppp

A post shared by Vinny (@vinnyguadagnino) on

The three reality stars gathered to celebrate Sammi’s 29th birthday, but there's been speculation that the on-again, off-again couple may be dating again.

Though the two broke up “permanently” in 2014, it seems they just couldn’t stay away from one another!

Well — we guess this is why you shouldn't ~fall in love at the Jersey Shore~!

Watch the cast of 'Jersey Shore' stars then & now:

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