The Jersey Shore kids just arrived back from Italy days ago and are set to begin filming season 5 at the Jersey Shore this weekend….but TMZ has learned that will be the last season you’ll see all 7 original guidettes and guidos together under one roof! Hit the jump for details.

Marisa Mendez

Although some big wigs on the show denied it last week, we’re told MTV wants a fresh cast of characters after they wrap Season 5 — which begins shooting in New Jersey Monday.

Here’s the thing. MTV gets the best of both worlds. They can keep the “Jersey Shore” machine going by growing a new crop of much cheaper stars. And, as for the break-outs in the original cast — including The Situation, Snooki, JWOWW and Pauly D … the network has already signed them to spinoffs.