“All That” alum Christy Knowings died Tuesday after suffering an asthma attack. She was 46.

The Nickelodeon star died after she was placed on life support at a Los Angeles-based hospital last Friday, TMZ reported.

According to the outlet, her family ultimately decided to take her off it.

Knowings was a regular on “All That” for three seasons from 1997 to 2000 alongside Amanda Bynes, Nick Cannon, Kenan Thompson and more.

She played various roles on the comedy series, including Jessica and Penny Lane.

Her last TV role was as herself on “Sesame Street” alongside her twin brother, Chris.

Knowings starred in three episodes on the children’s show from 2008 to 2011.

Additionally, she released the 2020 track “To the World.”

Before her death, the former child star was not very active on social media. However, she previously shared several photos of herself posing with “All That” fans from time to time.

Knowings was also featured on the June/July 2026 cover of Black Beat magazine.

Knowings’ death comes after fellow “All That” alum Kianna Underwood died in a hit-and-run accident in January.

The 33-year-old actress was struck while walking in the Brownsville neighborhood of Brooklyn, New York, and pronounced dead at the scene.

Story developing…