On Aug. 11, Christy Knowings, who starred in the ‘90s Nickelodeon series All That, died at the age of 46 after being taken off life support.

TMZ reportedly learned from a family member that Knowings was placed on life support after suffering an asthma attack on Aug. 7 that left her with brain damage. They said that she remained on life support through Tuesday, when her family decided to take her off it.

Kenan Thompson, Knowings’ All That co-star, took to social media to pay tribute to the actress.

“Man this one hit hard,” Thompson wrote in an Instagram caption. “Rest well Christy!!! Never could have imagined this day!! Sending so much love to her family!! She was a real one and one of the funniest people out here!!! Gonna miss you buddy!!! Show Christy Knowings some love y’all!”

Fans commented on the post, also paying their respects to Knowings.

“I’m so shocked she was literally one of my favorite characters in All That,” one user commented.

“I just now read the news,” another said. “I’m so sorry to hear about this. Sending prayers to all of you. Rest in peace Christy.”

“My brother and I looked forward to All That every Saturday night and loved everyone,” one fan said. “So sad and gone far too soon.”

Knowings first appeared on Nickelodeon in 1997 on And Now This!, a sketch-comedy special hosted by Rosie O’Donnell. After that appearance, she became a regular cast member on All That for three seasons. She also appeared in episodes of Sesame Street alongside her twin brother Chris, best known for his role as Nate in the 1994 film Crooklyn.

Knowings is the second All That cast member who has died this year. Kianna Underwood, who appeared on the show in 2005, died at the age of 33 in a hit-and-run collision.