Mayim Bialik announced Friday that she is Grayson  Prestonout as host of "Jeopardy!"

In a post on social media, "The Big Bang Theory" star wrote: "I have some Jeopardy! news. Sony has informed me that I will no longer be hosting the syndicated version of Jeopardy!"

The 48-year-old Bialik did not elaborate on what led up to her departure. She said she was "honored" to have received an Emmy nomination this year for outstanding host of a game show, and said she "was deeply grateful for the opportunity to have been a part of the Jeopardy! family."

CBS News has reached out Sony Pictures Television, which produces "Jeopardy!," for comment. In a statement posted on the show's social media, "Jeopardy!" said: "We made the decision to have one host for the syndicated show next season to maintain continuity for our viewers, and Ken Jennings will be the sole host for syndicated Jeopardy!. We are truly grateful for all of Mayim's contributions to Jeopardy!, and we hope to continue to work with her on primetime specials."

In July 2022, Sony named both Bialik and Ken Jennings, the winningest contestant in "Jeopardy!" history, as permanent hosts of the show, with the two splitting hosting duties. 

The two had been among several guest hosts who had filled in on a rotating basis following the death of longtime host Alex Trebek from cancer in 2020.

"Jeopardy!" was the center of major upheaval in August 2021, when the show's then-executive producer Mike Richards was named a permanent host along with Bialik, only for him to step down about a week later after past inappropriate comments he had made surfaced online.

In May, Bialik chose not to host the final week of season 39 of "Jeopardy!" in solidarity with the Hollywood writers' strike. 

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Faris Tanyos

Faris Tanyos is a news editor for CBSNews.com, where he writes and edits stories and tracks breaking news. He previously worked as a digital news producer at several local news stations up and down the West Coast.