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Ryan Knight, star of "The Real World: New Orleans" and "The Challenge" has passed away at the age of 29. The cause of death was not immediately known. The Kenosha police have independently confirmed his death, which was already reported by people close to the reality star.

"We are saddened to hear the news of the passing of Ryan Knight," MTV said in a statement. "Our thoughts and condolences are with his family and friends at this difficult time."

Friends and loved ones took to Twitter to mourn Knight's passing.

Jemmye Carroll, Knight's on-again, off-again girlfriend, mourned his loss on Twitter:

She also shared this sweet tribute:

Friend and former "Challenge" cast member Zach Nichols tweeted a heartfelt goodbye to his friend.:

"The Challenge" star Camila Nakagawa tweeted this picture of Knight and Diem Brown, who recently passed away after a ten-year battle with cancer:

Click Here To See How The Rest Of Ryan's Castmates Have Paid Tribute To Their Friend

MTV News will continue to update this story as we have more information.

Please leave your thoughts and remembrances in the comments below.