Ronnie from "Jersey Shore" is going all out for his 25th birthday party this weekend -- in fact, TMZ has learned, dude already lined up over $11,000 worth of Grey Goose and Dom Perignon ... just for starters.
Sources close to the reality star tell TMZ, as soon as Ronnie sits down at his VIP table at Jet nightclub in Vegas on Saturday ... he'll get 2 magnum bottles of GG ($950 each) and 5 magnum bottles of Dom Rose ($1,875 each).
That's a grand total of $11,275 -- but good news for Ronnie, it ain't gonna cost him a dollar ... we're told the nightclub is comping everything.
Ronnie will be joined by his on-again, off-again GF Sammi Sweetheart and his manager Matt Cohen, plus six of his best buds from NYC.
P.S. -- Nice shirt pal.