Celebrity Julie Benz Is Engaged Fiancé Rich Orosco's proposal was simple – and followed by a surprise Mexican fiesta party By Alison Schwartz and Aili Nahas Aili Nahas Aili Nahas is the West Coast Deputy News Editor at PEOPLE. She is also the TV deputy in Los Angeles as well as the Weddings Editor. Aili has spent nearly two decades in the entertainment industry and 12 years at PEOPLE. People Editorial Guidelines Published on June 27, 2011 06:20 PM Share Tweet Pin Email Photo: Jason Merritt/Getty Actress Julie Benz is taking on a new role: fiancée! The former Dexter star, 39, is engaged to her boyfriend of four years, marketing executive Rich Orosco, her rep confirms to PEOPLE. Orosco, 38, popped the question with a customized Kwiat cushion-cut diamond and platinum engagement ring – complete with a diamond frame and milgrain edge band – on Sunday in the backyard of the home they share in Los Angeles. “It was absolutely perfect,” Benz, who can next be seen on Royal Pains, tells PEOPLE. PHOTOS: What Gown Will Star Brides Wear? Nearly 60 of their closest friends and family – and a Mariachi band! – helped them celebrate their engagement at a Mexican-style surprise party Orosco planned. “The proposal was simple and beautiful – and then I was shocked by the pop-up surprise Mexican fiesta engagement party,” she says, adding, “What girl doesn’t want to be serenaded by a Mariachi band surrounded by close friends and family?” This will be Benz’s second trip down the aisle. She was previously married to actor John Kassir in 1998, but the couple divorced in 2007.