Bob Carter, the father of former pop stars Nick and Aaron Carter, has reportedly passed away.
He was 65 years old.
Sources close to the Carter family tell TMZ that Bob passed away in Florida on Tuesday night.
No cause of death has been revealed, but it appears that the Carter's passing was unexpected.
In a tweet that's since been deleted, Aaron stated that his father had been found unconscious in the hours before his death.
In addition to raising two of the best-known pop stars of the late '90s and early 2000s, Bob appeared in his sons' reality show, House of Carters.
The show, which ran for one season on E! in 2006, also featured Bob's other three children, Leslie, Angel and Bobbie.
Sadly, the Carters were unable to maintain their popularity, and both brothers wound up as tabloid staples during their respective downward spirals.
Aaron Carter filed for bankruptcy and checked into rehab during a dark 18 month time period that started in 2011.
These days, he's reportedly sober, but still far from being back on his feet financially.
For his part, former Backstreet Boy Nick Carter hasn't fallen quite as far, but he's had own struggles with substance abuse and the law.
Last year, Nick was arrested after getting involved in a bar brawl in Florida.
Bob's death is just the latest sad chapter in the Carter family saga.
Nick and Aaron's sister Leslie Carter passed away in 2012.
Both singers paid tribute to their father on social media today.
“I am heartbroken to share the news that our father, Robert, passed away last night…” Nick tweeted moments ago.
“While we learn more about the cause of death, and begin the grieving process, we ask that our privacy be respected at this difficult time.”
“My heart is completely shattered,” Aaron, 29, tweeted.
“I’m in shock and I loved my dad so much. #RIP DADDY I Love You.”
In an Instagram post, he added, “My heart is broken. We are so hurt we lost you poppa way too soon. You were never human to me, you were always my real life super hero.”