01/26/2015 10:51 EST | Updated 01/26/2015 10:59 EST

Sofia Vergara Shows Engagement Ring On The SAGs Red Carpet

Being engaged really becomes Sofia Vergara!

On Sunday, the "Modern Family" star strutted her stuff on the 2015 SAG Awards red carpet alongside fiance Joe Manganiello, making it their first red carpet together since they got engaged.

The 42-year-old stunner flashed her huge diamond engagement ring, which complemented her red silk georgette gown, designed by Donna Karan Atelier. The floor-length, one-shouldered dress featured an exposed corset and a long train that blended into the red carpet.

"You know with me it's all about the bling bling so he knew what I needed," Vergara told Access Hollywood as she flashed her sparkler. "I opened it up and I checked it to see," she joked, pretending to bite the diamond to make sure it was real. "And then I was like, 'Yes!' No I'm joking, he's so handsome that it I would have said 'okay' anyway."

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Photo gallery 2015 Screen Actors Guild Awards Red Carpet Fashion See Gallery