'Vampire Diaries' Star Finally Divorced -- He Vanted A Prenup ... And It Paid Off!

"Vampire Diaries" star Paul Wesley is rightfully sucking the joint bank account dry ... we've learned he's getting the lion's share of loot in his divorce from Torrey DeVitto ... a divorce that is now final.

Turns out Paul and Torrey -- who also appeared on the show -- signed a prenup -- obtained by TMZ -- that keeps all their earnings separate ... and he made WAY more than her. On top of that, the prenup provides he gets all the money he fronted for the purchase of their home -- $730,593 -- and she gets what she put in -- a measly $10K.

They were certainly into motor vehicles. He gets to keep the Prius, the Triumph Bonneville chopper and an Audi Q5. She gets an Audi A4.

The couple married back in April 2011 and separated in July. They have no children together.

So who's the sucker now?