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‘All That’ Star Christy Knowings’ Cause of Death Revealed, Reports Say

The former All That star died after an asthma attack, and her death certificate lists cardiac arrest with respiratory failure and asthma-related conditions.

  • A death certificate released Wednesday, September 2, confirmed former Nickelodeon actress Christy Knowings died of cardiac arrest. The 46-year-old passed away on August 11 following a brief hospitalization.
  • Knowings was admitted to a Los Angeles-area hospital on August 7 after suffering a severe asthma attack. Her father, Charles Dunn, confirmed the family removed her from life support four days later.
  • The actress gained prominence on Nickelodeon's All That from 1997 to 2000, appearing in all three seasons. She later appeared in several episodes of Sesame Street alongside her twin brother, actor Chris Knowings.
  • Manager Al Hill described the late star as "multi-talented" and "dedicated to her work." Former co-star Kel Mitchell remembered her as "so naturally funny, incredibly talented, and fearless" on the All That set.
  • Knowings is the second former All That cast member to die this year. Kianna Underwood, another former star of the sketch comedy series, was killed in a hit-and-run collision in Brooklyn in January.
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TMZ broke the news in Burbank, United States on Wednesday, September 2, 2026.
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