X17online told you first! Brad Pitt and Angelina are now officially engaged, but their wedding preps began long before Brad put a ring on Angie's finger ...

The long-time couple began renovations on a private wedding chapel at their French chateau, Miraval, last year, in anticipation of the big day. The 14th-century estate and vineyard has been in a permanent state of remodeling and construction for almost a year, but it appears work on the property is close to being finished.

So did Angelina know Brad was going to pop the question? Sure!

The pair had already planned out a super luxe wedding at their compound in the south of France and sources tell X17online, the date is set for this fall!