So that's her secret!
Kaley Cuoco has just signed on to tout the benefits of acne skin-care line Proactiv, a rep for the Big Bang Theory star confirmed to Us Weekly.
After the news broke Wednesday, Cuoco tweeted she's "so thrilled!!!!" to be a part of the campaign, which has no launch date set as of yet.
Most recently, Glee star Naya Rivera repped the brand. Past spokespersons for Proactiv have included Jessica Simpson, Avril Lavigne, Julianne Hough, Justin Bieber and Katy Perry.