Tyler Duckworth, a reality TV star known for appearances on MTV’s “The Real World: Key West” and six seasons of “The Challenge,” has died at age 44. His mother, Joni, announced his death Thursday on Facebook, saying he passed away earlier this week. The cause of death has not yet been released. According to Variety, Duckworth died in North Dakota. Duckworth first joined the MTV family in 2006 as a cast member on “The Real World: Key West.” He went on to compete on six seasons of “The Challenge,” winning twice during his time on the competition series. His death was confirmed by multiple outlets, including Deadline, The Hollywood Reporter, and E! Online. He is survived by his mother, who shared the news publicly. Tributes from fans and fellow cast members have begun to surface online, though no further details about his death or funeral arrangements have been made public.