Julie Benz is getting ready to walk down the aisle! The former Dexter star's boyfriend of four years, Rich Orosco, popped the question on June 26. In addition to the proposal, Orosco arranged for 60 of the couple's closest friends and family -- and a Mariachi band for a "pop-up Mexican fiesta" -- to celebrate their engagement. "I can't believe that none of my friends leaked the surprise," Benz, 39, told UsMagazine.com. "It was like a Navy Seal operation."