After their engagement on Christmas Day and an ensuing birthday trip to Hawaii, Sofia Vergara and Joe Manganiello spent their New Year's Eve catching Britney's Vegas Show titled, "Piece Of Me".

Sofia Vergara is best known for her role as Gloria Delgado-Pritchett in the hit series, Modern Family. She was once the new face of Cover Girl makeup.

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 Joe Mangeniello played Alcide Herveaux in the HBO series True Blood. He was declared one of the "100 Fittest Men Of All Time" in the fitness magazine Men's Health.

The beautiful pair met in July 2014. Since then they have been inseparable. They became engaged only after 6 months of dating.

Vergara and Manganiello weren't just a part of the audience in Britney's show. They also went backstage to run into another fellow star. Arnold Schwarzenegger.

The beautiful Sopranos star posted the picture in Instagram along with the Terminator actor and his girlfriend, Heather Milligan.

Along with the photo was the matching caption, "Excited for the new year! Wishing everyone a lot of work and happiness!" Indeed, for Vergara and Manganiello, they had started the 2015 on the right foot.

The Instagram pictures serves as a mini reunion for Manganiello and Schwarzenegger for starring together in last year's Sabotage.

Arnold Schwarzenegger serves as the True Blood star's idol.

Sources say he even wrote the foreword for his fitness book titled, "Evolution, The Cutting Edge Guide to Breaking down Mental Walls and Building the Body You Have Always Wanted. The book was released last year.

TagsSofia Vergara, Joe Manganiello