'The Real World: Hollywood' star, who famously battled addiction while filming the show, is believed to have died after taking a lethal mixture of Viagra, cocaine and alcohol on Friday, TMZ reported quoting sources.
Meanwhile, MTV released a statement mourning the death of the reality star.
"MTV is deeply saddened to learn that Joey Kovar of 'The Real World: Hollywood' has passed away. We offer our sympathies to Joey's loved ones, family and friends."
Kovar's family, however, denied that drugs play a role in his death.
"Everything was going very well. The very, very last thing that our family is suspecting is drugs," his brother David Kovar said.
An autopsy is expected to take place today. No foul play was suspected.