'Real Housewives of New Jersey' guest star Johnny 'The Greek' Karagiorgis dead at 41

The cast of "The Real Housewives of New Jersey" is mourning after the sudden loss of Johnny "The Greek" Karagiorgis.

>> PHOTOS: Notable deaths in 2016

"Entertainment Tonight" and NJ.com report that Karagiorgis, 41, died suddenly over the weekend from an apparent heart attack.

>> Click here to read a Facebook post about the news

Just found out some very heartbreaking news! The world lost a great man, husband, and father yesterday. John...

Posted by Rosa Montana on Sunday, June 5, 2016

Karagiorgis and his wife, Penny Drossos Karagioris, were featured on the reality show and were hair salon owners in New Jersey.

>> Click here to see her Facebook post

In 2013, Karagiorgis filed a lawsuit following a brawl that took place at the opening of cast member Kim D’s store, Porsche 2. At the party, Karagiorgis was approached by Joe Gorga and asked about remarks Karagiorgis made about his wife, Melissa.

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Things have been difficult for Drossos Karagiorgis. In February, she lost her friend and fellow reality TV star, Big Ang.

>> Click here to see her tweet about the loss of Big Ang

>> Click here to watch the news report from ET