Brad Pitt and Angelina Jolie -- Let's Get Intimate ... with TMZ

Brad Pitt and Angelina Jolie ... ACTUALLY TALKED TO US!!!

It all went down after the two had dinner at Boulevard3 in L.A. -- when BOTH superstars approached the photogs and chit-chatted it up.

Brad finally revealed why he refuses to sign autographs in blue ink ... and Angie pulled off one HUGE favor for one super-lucky fan.