The 42-year-old actress, who recently got engaged to actor Joe Manganiello, showed off her stunning ring at the 2015 Screen Actors Guild awards, where she walked the red carpet for the first time as his fiancee.
"It's going to be big. We started off with 20 (on the guest list), and now there's like pages and pages," she said.
Manganiello, 38, proposed to Vergara last month after six months of dating.
Vergara is planning to tie the knot with Joe Manganiello in the autumn because they are too busy to wed in the summer.