Kourtney Kardashian and Travis Barker are doing it up big, as expected, when they say their "I Dos" ... renting out an Italian castle for the super intimate ceremony.
We've spoken to sources close to the couple who tell us the newlyweds are celebrating in Italy this weekend, Portofino to be exact, to exchange their vows in front of family and a select group of friends.
In all, we're told it'll be Kourtney's kids, sisters, her mom and Corey Gamble as well as some close friends. Scott Disick was NOT invited. On Travis' side, he'll have his kids and a few close friends, including bandmates.
As for where the ceremony will go down, Castello Brown -- an incredible castle on the top of a hill -- has been swarming with decorators and security. We're told the entire castle has been rented out ... where guests can marvel at the stunning views of the harbor.
The whole weekend of festivities will span over 4 days. And get this, we're told they'll have ANOTHER big reception for more of their friends back in L.A. in the near future.
It's now a museum as well as an event and wedding venue.
TMZ broke the story ... Travis and Kourtney posed for pics in wedding attire outside the Santa Barbara Courthouse over the weekend. A source told us they've been legally married here in the U.S. ... but the castle trip is the fancy icing on the cake.