Sofia Vergara and Joe Manganiello Celebrate Their Engagement With Arnold Schwarzenegger — See the Pics!

Four months after Joe Manganiello proposed to Sofia Vergara, the pair celebrated their upcoming nuptials with an engagement party attended by one very special friend — Arnold Schwarzenegger!

During the party, which took place on Saturday, May 9, the Modern Family star's 22-year-old son Manolo Gonzalez Vergara took to his Instagram page to post a photo of Arnold, 67, delivering a toast to the happy couple.

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"Congratulations to these two ugly people. It's so sad, but luckily they have me to aspire to, physically," Manolo joked in the photo's caption.

So why was the action hero in attendance? It turns out the Terminator star and Joe have remained good friends since the pair co-starred in the 2014 crime film Sabotage.

For the occasion, Sofia, 42, looked stunning in a strapless red dress while her 38-year-old fiancé donned a stylish black suit.

RELATED: Sofia Vergara and Joe Manganiello Are So in Love, They'd Get Married Tomorrow! (REPORT)

"Gracias a mi bella familia por venir!" the actress captioned a photo on her Instagram page to thank her "beautiful family" for attending the night's festivities at Soho House restaurant in West Hollywood. In another shot of her cuddling up to Joe, she similarly thanked friend Barry Peele for hosting the party.

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Sofia and Joe became engaged in December 2014 after dating for only six months. In a recent interview, the star revealed she and the Magic Mike actor set a wedding date for their upcoming nuptials!

"Yeah, we have a date," the actress told Ryan Seacrest on his radio show on Wednesday, May 6. "It was kind of difficult because we're both working, and you never know what's going to come in our work. But we had to stick to it because it was impossible to book a place with short notice."