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Kaley Cuoco Recounts Botox Mishap That Stalled Her Expressions on Big Bang Theory

On The Graham Norton Show, she said the on‑set freeze led her to stop forehead treatments to keep her face expressive.

Overview

  • Cuoco said a mid‑series Botox injection left her forehead immobile during a filmed scene, undercutting her comedic delivery as Penny.
  • She explained that she began Botox about halfway through the CBS sitcom’s 2007–2019 run and immediately regretted treating her forehead.
  • The actor said she still uses small amounts of Botox around her eyes and on her neck but avoids her forehead to preserve performance nuance.
  • Cuoco noted that fiancé Tom Pelphrey had never heard of the show when they met and still has not watched it, a point she reiterated on Graham Norton.
  • Asked recently about a return as Penny in the spin‑off Stuart Fails to Save the Universe, she teased the idea without confirming any involvement.